Two men are sitting at the bar One says to the other: ""So I've just crawled into bed. My wife's sound asleep. All of a sudden the smoke alarm starts chirping because the battery died."" The other guy says: ""Let me guess. You tried to ignore it, drift to sleep and deal with it in the morning?"" ""No way. Do you think I am lazy?"" ""Sorry. It was a just an idea. I guess you snuck out of bed, grabbed a 9-volt, and replaced the battery?"" ""Of course not! Do you think I'm stupid?"" ""Fine, I give up, what'd you do?"" ""I snuck out of bed. Lit the curtains and came here.""