A man is having a few drinks at a bar when he looks over and notices a drunk guy passed out at a table nearby. The bartender tells him the drunk is Mr. Murphy and asks the man if he could drive Mr. Murphy home.
This concerns a question in a physics degree exam at the University of Copenhagen: "Describe how to determine the height of a skyscraper with a barometer."
"If the enemy is in range, so are you." -Infantry Journal, "It is generally inadvisable to eject directly over the area you just bombed.." -U.S. Air Force Manual
A man doing market research knocked on a door and was greeted by a redhead with three small children running around at her feet.