A commercial pilot always aggravated the air traffic controllers
in the tower with the same joke: when he descended to get ready to
land and he came in sight of the airport, he would get on the radio
and instead of identifying himself, he would say, "Guess
who??"
Well, this got old pretty quick till one evening one of the
controllers said "Watch this, you guys, I'm gonna get him good this
time!"
So when the pilot pulled his old joke and said "Guess Who??", the
air traffic controller extinguished all the lights on the runway
and replied, "Guess WHERE??"