Cash in Glass

This is a really creative advertisement, I think. 3M is so sure their Security Glass is unbreakable* that they encouraged people to kick the glass at this bus stop to get at the money inside. Before you wonder why people didn't cheat and try to break the glass with a drill / power saw / blowtorch / sledge hammer, 3M also posted a security guard there to make sure no one broke the rules. I would have liked to have a go. Seems like it would be fun, or at least a form of stress release.

* Of course, I think they're assuming relatively normal conditions.