Cerim Crucible no sprinting insta-die bug

Playing in the Cerim Crucible, in the first offering you can give in the stone-arena with multiple bridges overlapping, my character refuses to sprint, and when I jumped across a gap to face one of those fireball-throwing enemies, my character just instadied. Now I can NOT move, attack, heal, open the menu or even exit the game. Literally the only option I have left is ALT + F4. Quite annoying as I was doing so well for the first time!

Here is a link to a youtube video showing the bug