Audience: "How cold was it?"
Johnny: "It was so cold, the politicians had their hands in their own pockets."
Audience: "HOW HOT WAS IT?"
Carson: "It was so hot, musicians were snorting ice cubes."
Audience: "How hot was it?"
Johnny: "It was so hot, over at the Hollywood Wax Museum the best part of Raquel Welch was touching the floor."