Maybe John goes out a little farther, near a lake or large body of water. Maybe during that, he hears some mild swearing and the sounds of violence.

A few minutes later, Midnighter will burst out of the trees, currently shirtless and with scratches over his chest, bleeding slowly. He's wet all over, and carrying a iridescent, rubbery severed arm. He throws the arm on the ground, and wipes some blood off his face, noticing John belatedly.

"You." He points. "Don't touch that." He points to the arm. The numbing agents are probably a bitch to deal with if you're a normal human. Hell, they're a bitch to deal with for him. He shakes his head, trying to knock some sense into it, before looking back at the water, now bubbling with the creature under it. "I'm going back in. Fucking cover me, or something."

He holds up his fingers in the shape of a gun, pew pew.