When a Pittsburgh bank robber was handed a wad of cash by the teller at a local Citizens Bank, he probably thought he was going to get away scot-free. However, he was unaware that this bank's security system included a set of bulletproof glass double doors that can be used to capture thieves. 

When security system snared the thief, he sensed that he was all but caught and began "flailing around, screaming, and banging his arms and head on the bulletproof glass," cutting open his head. Clearly, in his state of panic, he didn't realize that trying to headbutt his way through a glass door wasn't the best course of action. 

Hopefully, everyone in the bank crowded around the doors pointing and laughing at him, because if you let yourself get caught that way, then you have that coming.

[via The Huffington Post