Why You Trippin'? 15 Celebs Caught Mid-Wipeout!

What is it about people tripping? The panicked expression; the flailing, futile attempts to stop the tumble -- it's all so hilarious. Especially when celebs do it (they should be above falling, somehow, so it's extra-funny). Here, we caught 15 stars in mid-tumble. Share a sick giggle with us at their expense!

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Rihanna

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Emma Roberts Goes For A Coffee Run In Armani Exchange Denim - Wilmington, NC

Celebrities Visit "Late Show With David Letterman" - April 5, 2011

Zac Posen - Runway - Fall 08 MBFW

Celebrity Sightings in New York

EXCLUSIVE: This is the shocking moment Lady Gaga plummeted from the top of a burning piano landing flat on her back, but was amazingly able to get back up and carry on her high-octane show

Celebrity Sightings In New York - September 13, 2009

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85th Annual Academy Awards - Show

Celebrity Sightings In New York City - March 24, 2012

Lindsay Lohan takes a fall outside a friend's house in Hollywood

Celebrity Sightings In New York City - April 4, 2011

78th Annual Academy Awards - Show

[Photos: Getty Images, Splash News]