Last one liner as you die?

[lack of self CTRL]

"when you get home... tell your wife why i was late"

or say nothing just lean back & make the 'SHOOOOOOOOOOM' bullet time sound

 

[mr-fix_it]

"not this shit again."

 

[Faulty Turmoil]

"In soviet Russia, gun fires you!"

I'm very sorry, but:
Huge Spoilers

Spoiler

"Rosebud is a sled! soylent green is people! Bruce Willis is a ghost! Wash dies! Snape kills Dumbledore! Tyler Durden is Jack!"

Quickly followed by a thousand gunshots from angry movie geeks.

Again, I'm very sorry.

Or:
I bakeded teh commender sum cookiez, but I eated tem.
Spoken like a lolcat, of course.

EDIT: "Let me tell you something 'bout the the government: They're fuckin' up, the environ-ment. They're taking all the fucking beautiful animals, yeah. And making them fucking extinct!
The government totally sucks.

Anyone know what that's from? Anyone?

Tenacious D the P.O.D

 

[Everin]

This holiday was not how you described it, ma...

 

[ethaninja]

"Well bugger that!"
"I'M INVINCIBLE!!!!!!!!!!!"
"Damn, those alien bastards are gunna pay for shooting up my ride!"
"That's all folks"

 

[Bored otter]

For what?...

As a last response to any duck or run warnings.

 

[ethaninja]

"ZEPPELIN RUUUUUUUUUUUUUUUUUUUUUUUUUUUUUULES!"

Hehe hell yeah ;D

 

[ethaninja]

"I...just lost...the game...ahhhhhhhh"

that would suck, for those who play The Game

I just lost the game ... ***** >.<

 

[Not-here-anymore]

"This isn't where I left my car!"

Or, more likely

"Bugger"

Or, if I can remember it at the time

"What you have are bullets and the hope that when your guns are empty I'm no longer standing, because if I am, you'll all be dead before you've reloaded."

Naturally, I consider it very unlikely that I'll still be standing at the end of it...

EDIT: Or, just maybe, that immortal battlecry that resonates through the ages.
"LEEEEEERRRRROOOOOYYYYYY!!!!"

 

[thats it exclamation]

hurk... blah!

huruerkuerguerk!!!

 

[TankTop]

Before I die...I have to tell you...

...I always hated you in high school.

 

[Faulty Turmoil]

Errrr... Pizza delivery?

 

[Jnat]

"WHERE ARE MY ARMY?!"

 

[tanithwolf]

"This is the worst execution I've ever had"
or
"You're no longer invited to my birthday"

 

[JTLW]

"Motherfu-"

 

[lukeyboy270]

I...thought...this...was...lazer...tag

 

[guyroxorz]

Respawn in 10... 9... 8...

 

[Snowpact]

'That train isn't going to stop, is it?'
Or
'Snake? Snake?! SNAAAAAAAAAAAAAAAAAAKKEE!'
or
'Would you kindly shoot me?'
or, while avoiding gunfire:
'This will be the day where you almost... *impact* caught... *coughs* Captain... *coughs violenty* Jack... Sp-*dies*

or, of course:

'leEEEEEEEEEEEEEEEEROOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOY... JEEEEEEEEEEENKKKKIIIIIIIIIIIIIIIIIIIIIINNNNSSSSSSSSSSSSSSSSSSSS...'
And then while heading towards the afterlife:
St. Peter: 'Damnit, Leeroy'
Me: 'At least I got chicken'

Urgh... I'm out of shape.

 

[DrMetal]

IDDQD... Shit...

 

[carpathic]

not again.....