I'm playing in an expert alliance, and fighting a mystic symbiote on AQ. I have a 5/50 X-23 with a little over 12,000 health. I put enough bleed stacks on the symbiote that it'll die. I'm standing on the opposite side of the screen, not moving and holding block, to let the fight end without risking damage. It fires off a special-2, but I get a KO while it's going through the animation. Then, I lose 17% of my health (about 2,000 damage) as the fight ends.