Lost, Season Two

Desmond:
Kelvin! Hey, Kelvin.

[Desmond runs to the computer and enters the Numbers. Desmond hears Kelvin singing and sees a bottle of booze on the floor. He opens a grate on the floor and finds Kelvin drunk under the Hatch holding a key dangling from a chain.]

Inman:
I couldn't do it. I couldn't do it.

[Desmond makes his way over to Kelvin who is lying next to a small alcove. We see a lid has been opened to reveal a place to insert the key and a sign that says Caution:
System Termination.]

Desmond:
What is this?

Inman:
This is the only other way out, partner.

Desmond:
What are you talking about?

Inman:
Failsafe. Turn this key and this all goes away.

Desmond:
What's behind that wall, Kelvin? Huh? What was the incident?

Inman:
Electromagnetism, geologically unique. The incident-there was a leak. So now the charge builds up and every time we push the button it discharges it before it gets too big.

Desmond:
Why make us do it-push the button? If we, if we can just...

Inman:
[laughing and closing the lid] Here's the real question, Desmundo-do you have the courage to take your finger out of the dam and blow the whole thing up, instead?