gaki no tsukai "butt sculpture"

Hi, does anyone know or have video of some of these guys making some kind of bet game, where one team prepared something funny on someones ass, and other team had to see it and try not to laugh? I saw it on youtube about 4 years ago…cant find it now :S thanks!

The nearest i remember watching is [url=]this[/url:1dql3vnk].

If not, sorry.

thats it!! thank you so much :)