Jack was grinning from ear to ear. They were heading for an island that was notorious for sinking ships, whilst being chased by three ships filled to the brim with pissed off Marines. "Captain you are batshit insane in doing this course of action. I love it! This is what its meant to be as a pirate!" 

He walked to the back of the ship, turned his back to the Marine ships, and mooned them while laughing madly. "Up yours you sods!" He shouted at them. It could be that he may have lost his mind a tad.