He swallows again, not that he has much of a choice with Ed's hand mushed into his face making it hard to breathe.

There is some very obvious mental math going on about if Pratt is willing to quite literally die on the Izzy is my Captain hill. How many fingers he's willing to lose (and eat) and if he wants to keep his tongue to do so.

Ultimately, he likes his tongue right where it is and nine fingers seems like a decent number to have still. So he says nothing. Just waits for Blackbeard to let him up at his leisure.