Three men are in a hot-air balloon. Soon, they find
themselves lost in a canyon somewhere. One of the three men says, "I have an
idea. We can call for help in this canyon and the echo will carry our voices
far." So he leans over the basket and yells out, "Helllloooooo! Where are
we?" (They hear the echo several times). 15 minutes later, they hear this
echoing voice: "Helllloooooo! You're lost!!" One of the men says, "That must
be a Microsoft service tech!" Puzzled, one of the other men asks, "Why do
you say that?" The reply: "For three reasons. (1) he took a long time to
answer, (2) he was absolutely correct, and (3) his answer was absolutely
useless."