I seem to remember the big thing about getting out while in the drink is not to remove your seat belt until you have figured out an egress route.
Very correct. This was a prime element of the training I received. Do not loose your reference. I have swum inside inverted floatplanes during recovery, and it is amazingly disorienting, even though I swam into it from the outside with lots of time, rather than flipping in it in an emergency.
Training is important,
thinking about the possibilities is vital.