Put your money where your mouth is

3M is so sure their security glass can stand up to the test they decided to put their money up...literally! Stacks of money, encased in 3M's security glass and situated in populated urban centres for the public to amuse over. Apparently there was a security guard present to ensure no one took any money in the instant someone did break it (presumably with C4 or, in the case of Chuck Norris, by looking at it). Really clever bit of marketing nonetheless.