You break into the Mayor's coffers and see it's stuffed with coins and jewels. You manage to grab a handful of doubloons and the mayor's golden dentures. The false teeth are heavy and fetch a handsome sum when melted down.
You break into the Mayor's coffers but avast ye have let the door shut behind you and are locked in. To make matters worse, you've eaten a wee too many prunes and feel your lower intestines gurgle. The next morning the guards find that you've befouled the room and your pants.