The Tic Tac campaign "Worst Breath in the World" is a new take on the flash mob. The interactive ad features an unsuspecting bystander talking to the actors, who then, after a few moments, faint from the smell of the bystander's breath.
The prank leaves bystanders speechless, and some even attempt to aid the fainting actors. The stunt is a fun way to promote Tic Tac mints. For another cool flash mob idea, check out this flash mob proposal.