If someone says they’re gonna open up a can of whoop-ass, that means there is somebody out there putting whoop-ass into a can. I’d be more afraid of that second guy.
It's strange that it's socially acceptable for me to get into a swimming pool with a complete stranger but when I do the same thing in a bathtub, all of a sudden I'm "under arrest".
If your dog is barking at the back door and your wife is yelling at the front door, who do you let in first ? The dog, of course; He'll shut up once you let him in.