You're dying.

[Normalgamer]

"Live long and suck it!" while doing Spock's hand gesture. I'd leave like Spock did.

 

[Eatspeeple]

"Son...You must know... It's hereditary."

 

[The Night Shade]

I can see the Highway to Hell

 

[MONTGOMERYWOODRUFF69]

There is another Skywalker....................and dead. What? No one else thought of that?

 

[Blatherscythe]

"With my last breath, I curse Zoidberg."

Damn. You beat me to it!

 

[Souldemon8]

"I just wish I had more time for a bowl of chili."

"Do....a....BARREL ROLL!!!"

 

[Blatherscythe]

I would say, "At this point in my short lived life I realize something... I'm going to die a virgin..." then I would scream WWWWWWWWWHHHHHHHHHHHHYYYYYYYYY!?!?!?

 

[savandicus]

"I still thinks thats a funny word though...Buddha...hehe....*dies*"

10 points for the referance!

or for 5 points

"Why didnt you....DDDOODDDGGGEEEE!!!! bleg" *dies*

 

[Corn Cutter]

oh there's a lot of possibilities, tough mission
I really like the Kraken one said before.
Some ideas:

"You're all doooooooomed. muharharhar"

"^ godmode=1"

"F5"

or of course
"game over"

 

[Lifefable]

"I should have... ...rolled... Argonian..." -Dies-

Or better yet "HEAL PLZ."

 

[falcon1985]

No i'm not...

 

[WestMountain]

"I'll be back"

 

[JFSOCC]

"I F*'ed your mum"
"I was the one who "

or
"I'm Invincible!"
http://www.youtube.com/watch?v=fXW02XmBGQw

EDIT:
or "So long suckers"

I probably refrain from "Death is only the beginning" or "I'll be back"

 

[Flankhard]

In all honesty I think I'd say something like: "Could you all get out of the room for a sec. please? I don't feel too good and I'd like some privacy. Can't you see I'm dying over here?"

Maybe if I was old I'd want my family there when I passed but for know I view dying as a private affair and I wouldn't want an audience.

 

[Wyane380]

This is the first time I die. (gotta go out darkness style)

 

[Beest.]

"Bosco!"

 

[RhombusHatesYou]

"Cheer the fuck up, I'll be back in 3 days."

 

[hazabaza1]

"Well, this sucks."

 

[Mantonio]

"Quick! There is something I have to tell you! There is a million pounds buried at.. at..."

Or

"With my last breath... I CURSE ZOIDBERG!"

 

[Prometheous]

I'd have a few choices lined up. The first would be:

"KHAAAAAAAAAAN!"

Next: "And that's the end of that chapter..."

And: "You knew it was coming, what's the big deal?"

Or: "Indeed"

Finally, I might consider: "You know where the money's hidden, it's time..."