and nevermind
that they want people on opposite sides to jump at the same time, thus nullifying the attempt completely.

I suspect it's a trap for stupid people. They will secretly film the mongs who signed up on the 20th of july 2006, and then publish the video on the same site with the title "Look! We made all these mongs jump! HAhAHAHahahahaHAHA!".
( Dave Trouser ; the people's choice - 75% agree, Mon 1 Aug 2005, 13:21, archived)