The Saltine Challenge, the result of an advertising experiment gone horribly awry in the 70s, proposed that no person could eat 6 Saltines in 60 seconds without consuming anything else.

A great source of entertainment -- just get your friends to try it & prove Nabisco wrong. Take some bets.

The result: A dry wad of crackers caked to the roof of your mouth, and humiliation. Though it is possible to complete, I've seen it done on a number of occasions. Never 7 though.