CANNES - You don't really want to think about the end of the world as you lounge under the bright Riviera sun.  But since that's what their film, Last Night -- showing at the Cannes Film Fest -- is about, actors Callum Keith Rennie and Sandra Oh oblige us with musing of how they might spend their last six hours on earth:
 
 CALLUM: "I'd eat airplane food as my last meal. The kind you'd get in coach. The chicken entree."
 
 SANDRA: "Definitely Korean food. Dumpling soup. Now that's comfort food. And I'd be listening to something by The Clash."
 
 C: "Fractured Atlas by Elvis Costello."
 
 S: "For my last movie? Something really romantic."
 
 C: "Tommy Boy?"
 
 (They both howl with laughter.)
 
 C: "Okay, okay. Wings Of Desire. 'Cause, gosh darnit, the damn thing's so hopeful! Lemme switch that to the last 10 minutes of Apocalypse Now."
 
 S: "Casablanca! Romantic yet bittersweet."
 
 C: "So what about sex?"
 
 S: "I don't know. What if it was bad sex? Forget it!"
 
 C (smiling wickedly): "You can make even bad sex good."
 
 S: "Too much pressure."
 
 C: "I'd be so tense, I'd need a release."
 
 S: "But what if you couldn't release in TIME?"
 
 C: "But to go out while doing it ... the explosion in the end would be like ... death."
 
 S: "So the end of the world would be like one Big O?"
 
 C: "Yeah."
 
 S (teasing him about his brief nude scene in the film): "All you've been doing the last two days is obsessing about your ass."
 
 C (defensive): "It's just I've never seen it in that framework before. I don't want the terror of seeing my own ass on screen. What if I like it -- a LOT?" (He laughs.)
 
 S: "I think it's very important we see Callum's ass in the film. We never get to see enough men's asses on screen."
 
 C: "Let's change the subject."
 
 S: "Okay. The last book I'd read? Sexing The Cherry -- there's one page that describes these magnetic beings that are dancing ... spinning until they become particles of light."
 
 C: "I'd read The Toronto Sun. No question."