Photobombing - the (often intoxicated) work of a dude, dudette (or animal) who sneaks their way stealthily into your photographs, completely marring what would have been another awesome picture of you and your friends holding up your beverages and smiling.

Although often photographed, their kind remains a mystery. Who is this random being? Where did they come from, and what are their motivations? One golden moment of genius and then, in a flash, they are gone.

(Tons more hilarious pics after jump!)

Wonder in awe and amazement at their antics in this gallery of great photobomber moments we gathered from around the web including College Humor and Flickzzz.com