Best Deaths in Movie history *will contain spoilers obviously*

[Whacker]

This is how I'd like to die.

Hands down. If you're gonna go, why not take a 19km long super star destroyer with you, and a good chunk of a man-made planetoid for good measure?

[Conradus]

'V's death in "V for Vendetta"

After killing 12 men who emptied their entire clips on him, he kills them all with his knives before they reload. (Just as he said he would)
Then he dies and Evey (Natalie Portman) puts him on the metro he build to blow up the Houses of Parliament in London. And so goes V, with fireworks in the sky and on the ground. Truly a spectacular moment.

This isn't my preferred death, but the one I remember most fondly now.

[Samurai Waki]

Sir Bors, Monty Python and the Holy Grail;

Sir Bors: Right! Silly little bleeder. One rabbit stew comin' right up! ...

[Bijo]

Gladiator: when he dies at the end.

The Untouchables: when the cop dies in his house.

[GeneralHankerchief]

When Gen. Armistead bites it in Gettysburg.