Another well-known adventure has a riddle where, if you solve it incorrectly, you're attacked by a single weak construct. There's a row of about two dozen or so constructs, obviously lined up. After my party of adventurers solved the riddle incorrectly twice, they changed the puzzle: instead, the puzzle became finding a way to neutralize the constructs. They figured out a hilariously inventive technique for doing so, involving ramps, slippery slopes, and the limited tactical sense of a construct, and the punishment instead became an occasion for PC victory, as they answered the riddle incorrectly over and over until the threat was neutralized. It was great fun.