the bear's tricks are so unbelievable that even alex's sister yuki thinks it's a fake. >> there's a tonuff in japan, so i thought maybe it was a show or something. then he's like, no, it's real. >> alex uploads the video in september 2009. >> i start getting thousands of views, hits. i started getting really excited. then week after week it kept blowing up. >> before long, the video entitled "kung fu bear" receives more than 3 1/2 million hits on youtube. the video's so popular, it spawns numerous parodies. >> good morning, ninja bear. time to complete your ninja training. >> almost like the entire internet was riffing on this video for a little bit. >> i've seen ones with mortal kombat sounds. >> the light saber version where the bear's carrying a light saber instead of a stick. that one's funny. >> people want to recontextualize anything that's popular. it's a way people with participate in the viral revolution. >> but with growing popularity comes growing skepticism. many viewers think alex's video is a fake. >> the part where he flips the stick in the air and catches it, that's wher