Peter makes a few strong steps following Astin and he's already up to where he is. He nods for Astin to see as he eyes the door. "I'll manage it."

It's a short statement that leaves out a lot. He's holding back, not putting in everything he that could. There's not going to be much need for detailed explanation for what's going to do.

Peter winds up his arm, in a pause so brief it can barely be caught, before bringing a punch against the metal. When his fist hits the door the hinges are ripped off the walls as the door crumples away, caving inward and around his still forward moving hand.