[ I keep parenting back up to see what the heck is going on and if they were one the streets, Minato would have his pocket knife and its blade would go plunging into his wrist at this very moment. Instead, they're lying around somewhere with nothing but the towels around their waists and nothing to cut with. Except there is, and there is coincidentally a stray towel on the ground nearby that Minato drags over and ties around his and Souji's hands as tight as he can, securing a death grip. ]

Have it your way. Once blood flow gets interrupted, the appendage will necrotize and fall off. We'll see whose hand detaches first.