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Pictures | Tue Nov 1, 2011 | 12:45pm GMT

Trick or treat

<p>A man dressed up as the deceased Libyan leader Muammar Gaddafi takes part in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton</p>

A man dressed up as the deceased Libyan leader Muammar Gaddafi takes part in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

A man dressed up as the deceased Libyan leader Muammar Gaddafi takes part in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

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<p>People dressed as zombies dance to Michael Jackson's "Thriller" in the street during the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton </p>

People dressed as zombies dance to Michael Jackson's "Thriller" in the street during the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

People dressed as zombies dance to Michael Jackson's "Thriller" in the street during the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

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<p>Jennifer Kentner (C) and Mike Fitch (2nd R) dress up based on a scene from the music video "Here I Go Again" by Whitesnake at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. 

REUTERS/Jason Redmond </p>

Jennifer Kentner (C) and Mike Fitch (2nd R) dress up based on a scene from the music video "Here I Go Again" by Whitesnake at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

Jennifer Kentner (C) and Mike Fitch (2nd R) dress up based on a scene from the music video "Here I Go Again" by Whitesnake at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>A crowd of people dressed in Halloween costumes wait to participate in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton </p>

A crowd of people dressed in Halloween costumes wait to participate in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

A crowd of people dressed in Halloween costumes wait to participate in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

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<p>People dress up as comic book characters pose at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. 
REUTERS/Jason Redmond </p>

People dress up as comic book characters pose at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

People dress up as comic book characters pose at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>Gary Malone (R) and Chris Conner, both from San Bernardino, California, dress up in Klu Klux Klan costumes at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. 
 REUTERS/Jason Redmond</p>

Gary Malone (R) and Chris Conner, both from San Bernardino, California, dress up in Klu Klux Klan costumes at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

Gary Malone (R) and Chris Conner, both from San Bernardino, California, dress up in Klu Klux Klan costumes at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>Nathan Harris (L) and Matt Briskie, both from Los Angeles, pose as a "Occupy Wall Street" protester and a member of the richest one percent respectively, at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. 
REUTERS/Jason Redmond</p>

Nathan Harris (L) and Matt Briskie, both from Los Angeles, pose as a "Occupy Wall Street" protester and a member of the richest one percent respectively, at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011....more

Nathan Harris (L) and Matt Briskie, both from Los Angeles, pose as a "Occupy Wall Street" protester and a member of the richest one percent respectively, at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>A man poses in his costume as people take his picture during the West Hollywood Halloween Costume Carnaval, October 31, 2011. 

 REUTERS/Jason Redmond </p>

A man poses in his costume as people take his picture during the West Hollywood Halloween Costume Carnaval, October 31, 2011. REUTERS/Jason Redmond

A man poses in his costume as people take his picture during the West Hollywood Halloween Costume Carnaval, October 31, 2011. REUTERS/Jason Redmond

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<p>People, who dress up as comic book character Robin (L) and characters from the film "Pulp Fiction," walk down Santa Monica Boulevard at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. 
REUTERS/Jason Redmond </p>

People, who dress up as comic book character Robin (L) and characters from the film "Pulp Fiction," walk down Santa Monica Boulevard at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

People, who dress up as comic book character Robin (L) and characters from the film "Pulp Fiction," walk down Santa Monica Boulevard at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>A family walks down Santa Monica Boulevard during the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. 

 REUTERS/Jason Redmond </p>

A family walks down Santa Monica Boulevard during the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

A family walks down Santa Monica Boulevard during the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>Pumpkins carved by artists Ray Villafane and Andy Bergholtz (C) are displayed during a pumpkin carving exhibition in the Grand Canal Shoppes at The Venetian hotel-casino in Las Vegas, October 26, 2011.

REUTERS/Steve Marcus </p>

Pumpkins carved by artists Ray Villafane and Andy Bergholtz (C) are displayed during a pumpkin carving exhibition in the Grand Canal Shoppes at The Venetian hotel-casino in Las Vegas, October 26, 2011. REUTERS/Steve Marcus

Pumpkins carved by artists Ray Villafane and Andy Bergholtz (C) are displayed during a pumpkin carving exhibition in the Grand Canal Shoppes at The Venetian hotel-casino in Las Vegas, October 26, 2011. REUTERS/Steve Marcus

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<p>An Occupy Wall Street protestor wearing a Guy Fawkes mask takes part in the 39th Annual Halloween Parade in New York, New York, October 31, 2011. REUTERS/Andrew Burton </p>

An Occupy Wall Street protestor wearing a Guy Fawkes mask takes part in the 39th Annual Halloween Parade in New York, New York, October 31, 2011. REUTERS/Andrew Burton

An Occupy Wall Street protestor wearing a Guy Fawkes mask takes part in the 39th Annual Halloween Parade in New York, New York, October 31, 2011. REUTERS/Andrew Burton

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<p>Haunt actor Gus Maurer performs at the Spooky Ranch in Columbia Station, Ohio, October 2010. 

 REUTERS/Derek Vitas/Handout </p>

Haunt actor Gus Maurer performs at the Spooky Ranch in Columbia Station, Ohio, October 2010. REUTERS/Derek Vitas/Handout

Haunt actor Gus Maurer performs at the Spooky Ranch in Columbia Station, Ohio, October 2010. REUTERS/Derek Vitas/Handout

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<p>A woman poses during a Halloween party at Mao Livehouse club in Shanghai, October 31, 2011. REUTERS/Carlos Barria </p>

A woman poses during a Halloween party at Mao Livehouse club in Shanghai, October 31, 2011. REUTERS/Carlos Barria

A woman poses during a Halloween party at Mao Livehouse club in Shanghai, October 31, 2011. REUTERS/Carlos Barria

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<p>Lit-up toy eyeballs are suspended on sticks during the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton </p>

Lit-up toy eyeballs are suspended on sticks during the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

Lit-up toy eyeballs are suspended on sticks during the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

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<p>A fan passes an usher with his face painted on the back of his head for Halloween during an NHL game in Calgary, October 28, 2011. REUTERS/Todd Korol </p>

A fan passes an usher with his face painted on the back of his head for Halloween during an NHL game in Calgary, October 28, 2011. REUTERS/Todd Korol

A fan passes an usher with his face painted on the back of his head for Halloween during an NHL game in Calgary, October 28, 2011. REUTERS/Todd Korol

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<p>Angel Santigo (R) of Los Angeles holds his son Adrian Santiago at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011.

 REUTERS/Jason Redmond </p>

Angel Santigo (R) of Los Angeles holds his son Adrian Santiago at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

Angel Santigo (R) of Los Angeles holds his son Adrian Santiago at the West Hollywood Halloween Costume Carnaval in West Hollywood, October 31, 2011. REUTERS/Jason Redmond

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<p>People hold up life-sized skeleton puppets while walking in the 39th Annual Halloween Parade in New York, New York, October 31, 2011. REUTERS/Andrew Burton </p>

People hold up life-sized skeleton puppets while walking in the 39th Annual Halloween Parade in New York, New York, October 31, 2011. REUTERS/Andrew Burton

People hold up life-sized skeleton puppets while walking in the 39th Annual Halloween Parade in New York, New York, October 31, 2011. REUTERS/Andrew Burton

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<p>An Occupy Wall Street protestor dressed up in a zombie costume takes part in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton </p>

An Occupy Wall Street protestor dressed up in a zombie costume takes part in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

An Occupy Wall Street protestor dressed up in a zombie costume takes part in the 39th Annual Halloween Parade in New York, October 31, 2011. REUTERS/Andrew Burton

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<p>A woman puts on makeup during a Halloween party at Mao Livehouse club in Shanghai, October 31, 2011. REUTERS/Carlos Barria </p>

A woman puts on makeup during a Halloween party at Mao Livehouse club in Shanghai, October 31, 2011. REUTERS/Carlos Barria

A woman puts on makeup during a Halloween party at Mao Livehouse club in Shanghai, October 31, 2011. REUTERS/Carlos Barria

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