This guy built a following off one of the weirdest, funniest pranks online. But when you go viral too many times, people catch on. How long can someone fake authenticity before it all falls apart?

Watch this hilarious prank as I pretend to fall down the stairs in front of my best friend! Laughter, surprises, and epic reactions guaranteed. #PrankVideos #FunnyPranks #BestFriendPranks ...