He waits until it's all finished, just to be absolutely certain, then makes his swaying way back down to the shore. Jack cups his hands around his face, in order for his shout to be heard with perfect clarity, and bellows to the Dutchman's captain:

"Congratulations, William."

Jack's grin is real, and lacks any sign of madcap mischief.

"All's well. You've a fine son."