This situation popped up during this weekend's gaming session. While we were playing RM2, it applies to any game mechanic.
A player took a crit for 4 rounds of stun. No worries there.
The second round, he took 20 rounds of stun.
The third round, he had the same crit result and had another 20 rounds of stun.
Now I'm looking at 42 rounds of stun for him. Forget Stunned Maneuver. The hit points taken were low, no injuries/broken bones, and there were no additional hits lost from the crits, just tons o' stun.
I told him he was having the worst hangover of his life and the sad part was that he didn't even get to have any alcohol. The PC was lolling around on the ground trying to stay up on his hands and knees but failing at that.
At what point has a PC been knocked so far inept that you just tell him to lay down?
I've been popped in the head and have been stunned for a few seconds before. A friend of my mine had a concussion and was arguably "stunned and out of it" for several hours. Somewhere between concussed and 42 rounds of stun, something should happen.