I had a DM who set up a puzzle room, tiles on the floor with arrow traps. It ended up being the fibonacci sequence however, it started like, 15 digets in and none of us players knew which were correct. (didn’t wanna meta game and google it) So we just Dex rolled across the whole floor and were super wounded after. The next room over was a boss fight -_-

We probably weren’t supposed to be so wounded going in.