Jack looks slightly queasy at this approach.

"Eeew."

But as soon as Jones reaches the middle of the capstan, Jack Sparrow grins. He snatches hold of the nearest bit of wooden leverage and sets the capstan spinning around in a circle-- and Davy Jones with it.

"Ha!"

Jack's smugly triumphant look lasts until the spinning capstan brings Jones around to face him again with a snarl, at which point his reaction is rather different.

"AAAH!"

With a shriek Jack's off, scrambling frantically away across the deck, with Jones in close pursuit.