Japanese Spa Prank
Here's one of my personal favorites. It combines learning English with aerobics, a ridiculous looking mugger who wields what appears to be the blunt end of a teaspoon, and a cameraman who apparently has an obsession with armpits...
Here's a sequel if you want some more laughs. = )
And lastly this gem of a game show, where participants have to take the shapes of the cutouts in the large pink foam squares that come at them or be knocked into the pool of water behind them.