If no one noticed until the end, then the guy probably didn't say anything so it's his own fault. The least you can do when something like that happens is say "Hey guys...I see you are all gone from here and I'm stuck behind can you help?". Especially considering north part isn't exactly at the end of the raid he had probably been sitting there for quite a while saying nothing.

And stuck behind north doors? Seriously? Pull the lever? ...
He was probably piking...