Ok I do martial arts man and I weigh 195 pounds in real life and if someone slams into me or body slams me I lose no clarity im still thinking two moves ahead or more. Being hit does not stun you and since he is also surrounded by hellish energy that's pretty much like running head first into a burning metal wall. Plus he never turned his back on you in the first place he looked at the lich then did the energy thing then veered so the blind spot thing is kinda futile.