Stunned forge-master boss at the right time and he got locked in an animation loop.

I somehow managed to stun the boss at the correct time to somehow bug the ai. I was shooting my crossbow as he was going to start stomping, stunned him, he did the stun animation and everything and then got up and started stomping. However, It endlessly kept stomping, there weren't any lava obstacles coming out; he eventually began moving faster than the lava making him start stomping outside the lava. I managed to kill him, which made the fight really easy and i got rewards. But this sort of thing trivialised the boss which i don't really want.