I put some beer on the hook. I figure if that's what got him into this mess it should be able to get him out.
A man fell through the ice because he was drunk (indicated by the body outline in the ice), and his friend, instead of trying to save him by diving in, humorously thinks that fishing with a beer as bait will be sufficient to save his drunken friend. Also, a partial play on the saying: "I got myself into this mess, and I can get myself out."