I was supposed to come in (new character new game new table new group)one night as soon as other players (I only met 1 of them before and the DM) they already killed all the monsters and just were looting... I showed up a bit late to give them time... not enough.
the door out was locked. Not magically locked not trapped, just locked (and even I who wasn't there realized they had the key) and it took almost 3 hours of "I'm not touching it, we didn't lock it after we came in." like 15 minutes into this 3 hours I blurted out "Doesn't this basement door lock behind you automatically that is why it is propped open?" the DM looked at me with the most pained look and said "Yeah. basement auto locks behind you" but that didn't clue anyone in.
I thought this might be a joke. Back then we didn't have cell phones to play on, but I had a book on me. However after I tried to play with this group through this and another campaign...no, not a joke just how they rolled...