"Where is it? Where's the thump-thump?"

After searching long and hard for the key to the chest, Jack Sparrow and Co. finally found the chest that contained Davy Jones heart. after a long duel with James Norrington and Will Turner, Jack captured the key and regained control over the heart, and then preceded to lose it...Again.

He has control

He thinks he has control

He lost control

"I'll handle this, mate. Oi, fish-face! Lose something? Eh? Scungilli! [Mis-steps, falls down the stairs] Got it! Come to negotiate, eh, have you, you slimy git?! Look what I've got. [sing-song voice] I've got a jar of dirt! I've got a jar of dirt! And guess what's inside it!" [dumps out the jar of dirt]   "Where is it? Where's the thump-thump?" --Jack Sparrow