There are many doors, fences, walls etc in the elder scrolls world which can be used with this bug. You can pass through closed doors at the end or to the end (depends on side you bounced from) of dungeons and get out of the gameplay zone at all (trough doors to nowere or just through walls). More often you just stuck within wall or different kind of object.

How to reproduce:
Just make an agro mobs with attacks that bounces you back and stand near the door. You will be bounced through object (door) by enemies attacks (player can be pushed only with special heavy attacks or the bow ability that bounces you back will push you through some doors too).

It's more easier to try it if you have or if you is a healer (to heal yourself to be not killed before bounce). Usually when u playin, u stuck at the wrong time and only way is use /stuck command and start over..

I had a bunch of videos in this topic when created it 6 hours ago, but youtube deleted them.

This bug is not critical or blocking. There are more serious and important issues in game, which must be fixed ASAP. But, take it in mind and maybe some day u could fix it. Thanks for attention.