It is possible to get stuck in this game for many different reasons, but the most annoying ones I encountered are:
If you ride a horse and something throws you off with a stunning attack, you will get stuck in the "thrown off" animation, meaning you cannot attack, block, sprint or use something for 1-2 minutes which ends in death most likely.
Sometimes while using the Healing-Staff Power-Attack the Light-Animation gets stuck. This means that my Staff will now be alight until I relog. This is annoying because it pretty much hinders me from seeing most of the right part of my Screen (Playing in First-Person).
Next up is the dismounting your Horse while trying to talk to someone. Sometimes you cannot mount your Horse afterwards for up to 10 minutes.
If you get attacked while harvesting it is sometimes possible to get stuck in the animation loop, making you unable to attack or move for about 10 seconds.
Also there needs to be some kind of indicator when you get stunned by an enemy. User-side sometimes it just looks like you are stuck.