Something false about the way the tops come off. They seem to flick them off rather than make a rotating motion. And an odd sound effect.
We used to have a similar competition in West Wales. The finalists had a big felt tip pen taped to the skid. The competitors had to write Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch on a piece of A4.
Ok I lied about the A4.