I was in the downed state and hit mistform at the same time as I rallied.
When I rallied, I was invisible to only myself though. The centaurs kept hitting me with their swords and spears.
I could not cast any skills at all. Was totally helpless, albeit I could move around.
Totally stuck in mistform until I hit the downed state again (which didn’t take very long because I could not defend myself).
This was on a level 20 Asura Elementalist