The red-hot figure rushes at him and he reacts in an instant. The other disappearing heat signature is fully ignored to gear himself up for the most dire threat at hand. His body is still a little sluggish from the amount of regenerating he's had to do (even in dead-ish human form, it took him days to fully recover from a blast of that level), so he's punched square in the face.

He howls in pain and anger, clawing at 76 when he's able. Where once there would've been some satisfaction in the fight, in the thrill, is now just an animal-like need to kill.