I came across this on stumble video this morning, and I think it's one of the funniest pranks I have ever seen. I love pranks, and the Japanese are absolutely the best in the world at coming up with them. They're not afraid to take the necessary risks to come up with hilarious material. I don't want to give this one away, but I'll just say that it involves a "special" massage chair, a ski hill, unsuspecting (nude or nearly nude) victims, and a countdown timer.
There are two parts, and I suggest you don't miss the second one!