Pirates of the Caribbean: Dead Man's Chest2006

Marty:
[grabs a cloth] It's a key.

Jack:
No! [runs up and takes it] Much more better! It is a drawing of a key. [the crew is confused] Gentlemen, what do keys do?

Leech:
Keys... unlock... things?

Gibbs:
[catching on] And whatever this key unlocks, inside there's something valuable... So, we're setting out to find whatever this key unlocks?

Jack:
[gasps as if Gibbs correctly guessed the mission]... No. [Gibbs is confused] If we don't have the key, we can't open whatever it is we don't have that it unlocks. So what purpose would be served in finding whatever need be unlocked... which we don't have... without first having found the key what unlocks it?

Gibbs:
[understandingly] So, we're going after this key!

Jack:
You're not making any sense at all, mate. [Gibbs is more confused]