I like Japanese internet / Niconico meme than the western one, because of their creativity and is much funnier. Everytime there's an interesting video come up on NicoNico, there's always others who use that video to make MAD video.
I dont know what MAD is. It is basically a homemade fanvideo of other video, like from anime, game clips, or just some random Youtube video.
This month NicoNico meme comes from this Youtube video.
It's a clip from a 1973 Turkish movie Karateci Kiz (Karate Girl). The video also gain popularity in Youtube as The Worst Death Scene Ever.
The story version below:
Of course the screaming is actually edited by someone to make it look more ridiculous (as it already is). This is the original clip where there is no screaming at all (plus the movie doesn't end there).
There's so many video about this meme in NicoNicoDouga and I can't upload them all. You might check it yourself if you're interested.