Catacombs trolling me big time in The Secret of Monkey Island

Got to the catacombs 16 seconds ahead of my best pace ever, and found out that it's actually possible to get 7 exits instead of 6 or 8. No idea why. Nevermind, got there again, 3 seconds faster than in the previous run. This time, I found out that it's possible for Guybrush to get stuck :).