1. There's the "innocent till proven guilty" grimace, courtesy of Denver, the original guilty dog.

Videos of dogs getting busted and dealing with their guilt will always be hilarious. They want so much to please humans, but sometimes the doggy urge to eat an entire sack of treats or tear up the carpet overcomes them. These pups have a number of strategies for avoiding detection or assuming responsibility, depending on the situation. Let them guide your actions the next time you clog the office toilet. Do you come forward, or insist you've never pooped in your life?

2. There's the "slow backwards crawl."