Nat runs into his office, wearing only a hat and carrying a briefcase. His boss stops him and says "What are you doing, Nat? Do you realize you're naked? Shouldn't this be your day off?"
Nat calmly explains that he was in a party when suddenly the lights went out. Some voice said "Gentlemen, take off your ties." Somebody turned on the lights again and not a single guy was wearing a tie.
The situation repeated - the lights went out, but this time the voice said "Gentlemen, strip naked." When the light went back on, the ladies started giggling and clapping their hands because all the guys were naked.
The lights went out again and this time the voice said "Ladies, take your clothes off!" When the light came back on, all the ladies were naked.
The same voice said "Gentlemen, now get to work!"
"So I grabbed my hat and briefcase and came here, sir." - said Nat.