Don't use the teeth. The mark they'll leave is- he'll know.

[ There's a packet of razor blades in the medical kit. Not that they let him use them for the usual reasons, but they're sharp and kept clean by the paper they're wrapped in. Useful things to have. He unwraps one. Takes out other things - rose oil. Gauze. A dressing pad. ]

Give me ice. Tell me to help you. And hold out your hand.