When doing the games to get the exhalted armour, I was whirling on a mushroom when somebody finished the game and we got thrown out.
Everybody else ran off, while I was stuck on the spot still whirling. I was unable to move or use skills, so a passing mushroom was able to kill me easily.
Somebody killed the mushroom and ressed me but even then I was unable to use skills. I had to log out and back in to get back to normal.