With an abrupt turn of events, one finds everything upside down while hanging from a harness, little to no lighting, cold water coming into a warm cabin, and disorientation from shock.
A third panic, scream, and thrash about ineffectually. A third will begin to fight among themselves, especially if it appears someone is making progress toward escape. The remaining third have training or experience which guides their actions. Sometimes one has little choice except to let events play out, hold their breath, and bide time.
I think most would agree that the chances of a passenger getting out alive, without any training, is virtually zero. The question is, could the pilot have helped any of them get out alive if the pilot tried.