[ Hastily, Mouse tugs one of his hands free from the pockets of his jeans and pulls his sleeve down just far enough to expose his hand to the wrist. He stares at his fingers in consteration, opening and closing his fingers like a fist and trying (quite hard, mind you) to visualize exactly how a peg-fist might work.
action;
He peers at Rosella dubiously. ]
Peg. Fist.