Sometimes you will fall into a hole between rocks or other such place where you just can't break free, stuck in the landscape - either jumping too low or unable to jump out. In some cases, the only possible solution is reload your most recent save file. However, there are some tricks that may possibly help you to escape:
* If you are outside (on foot or horseback), fast travel to a nearby place.
* If you are in a town, wait for someone to pass by and attack with a weak spell, long sword, or bow. When the guard comes to arrest you, go to jail or pay the fine.