Darwin award for the army Colonel during the Boer War who, in an ultimately futile effort to increase his men's morale, stood up in his trench and proclaimed: "Those God-damned Boers can't shoot str..."
(One presumes he meant "straight", but let's face it, we'll never know for certain.)
I'd like my last words to be profound-sounding and, at the same time, utterly baffling. Something like "Rosebud" or "I smell bread". But less literary. That'd do me.
Or how about this: "That gold bullion I stole... it's buried in..." **chokes**