Well, it could easily make sense for my character to try to continue playing the game while the world ends. He doesn't deal all that well with problems, and escape from reality can be comforting:
Howard climbs the ladder, as the waters rise. "...huff...huff...Plagmor jumps back...huff...from the door...huff... 'What's up, Holmes?...huff...You almost...huff...took my head off, man!'...huff..." Howard helps Tim up onto the roof. Tim says "Where do we go from here?" Obviously there's nowhere to go, and the water is still rising. Howard continues: "Plagmor realizes he's talking to a hobgoblin, and he shoots it with his bow." and then bends down, rolling the d20 in the gravel of the rooftop...