[If the sentinels put up a bigger fight, then Michael responds even more viciously--it just feels so much better to destroy bots when he knows they could easily hurt or even kill him. It's thrilling, and he's still got a lot of the impulsiveness that comes with youth, regardless of how many years he'd trained as a fighter.
The only thing he can do is to try and wrench them apart, and even if he can't destroy them outright that way he can at least try to force their mechanisms to jam. His labored breathing means his muscles quickly begin to ache and twitch, and he tries to push through the shivering in his limbs, the nanites in his body struggling to repair whatever damage is done.
If it weren't for her, they'd probably have overwhelmed him by now, and he knows it--it certainly shows, too, in the way he tries to cover any blind spots she may have, pushing away bots that might try to sneak around to her back.]