See, this is a hard one. On one hand, my natural reaction is to say "Fools Gold" by the Stone Roses, because a) I fucking love that song b) it is long and c) maybe the beat would cause the gun wielding maniac to get their funk on, forgetting about me so that I can escape. But, I have heard that song thousands of times, so maybe I should revisit a song I've not listened to in a while. "Jock-o-rama" by the Dead Kennedys leaps to mind (not sure why) as does "Turkish Song of the Damned" by the Pogues.
If Shane McGowen drunken growling isn't the perfect foray into death, then I don't know what is.
I know that I wouldn't want to hear something new to me. I would hate to be seconds away from death, totally digging a song that I had never heard, because I know I'd just get all pissy with myself for all the time I wasted trying to get the appeal of Interpol when I could have just enjoyed the last band I will ever hear.
So, in conclusion, Johnny Cash's "25 Minutes To Go" has a certain appeal.