Some nobody broke his foot

While the CIA was busy testing their footbreaker, they put out a sign to warn the innocent bystanders. Someone became suspicious and had to find out what was going on. Once in the area with the CIA, the bystander became no longer innocent. The footbreaker had worked.

"These things happen, ya know?" said the Secret Dude of the CIA. "It's never happened before, but I know it does happen... Sometimes. As long as they can't sue us. It's not like they can, though. I mean really. It's not gonna happen. The bystander wasn't innocent no more."