DOOM GUY in chapter 21 when he encounters all might again and all might successfully throws the first punch, a punch that not only sends Doom Guy flying but also makes Doom Guy impressed instead of angry or annoyed with All Might. Why? Because he genuinely felt that punch and the punch managed to actually damage his armour (the damage is superficial at worst and is repairable), so now Doom Guy is eager and interested in seeing what else the first mortal human he has seen capable of actually doing damage to him (even if it’s nothing much) is capable of and if he could go beyond his limits be like:; DOOM GUY; DOOM GUY
