I found a Trigun version of another one of those Nicovideo fad dances in the vain of Caramelldansen and Danjo Danjo (That makes three hand drawn Trigun MADs... crying ) I really don't know what the dance is called, but Vash is adorable in it (Not the song, though xD)

I also like the part where Wolfwood looks up the upcoming Trigun Movie...

Anyway, Here it is