Naturally, I would find the closest guy that isn't related to me and kiss him. If he asks why, I'll cheerfully reply that if I'm going to die anyway, I might as well cheer somebody up in the process.
... If he asks me to take off my shirt and show him my breasts or to pitifully try (it's not like we would have time to, anyway) to have sex with him, however, I would spend whatever time left making sure that he would die before I did. Then I would spend the last seconds of my life laughing over his corpse. Hey, I'd want to die happy too!
If there was no eligible guy nearby, I would probably just shrug, and say something incredibly geeky, like, "I hope the re-spawn point isn't too far away.", "And I just paid my armor repair bill too...", or "It's OVER 9000!!!"