During a training session at an artillery unit the sergeant-major was
busy describing how the sophisticated aiming device of the artillery
weapon system is used:
"As you all know, there are 180 degrees in a circle."
One of the soldiers put up his hand and said: "But there are 360 degrees in a circle, sergeant-major."
"You idiot," replied the sergeant-major, "I am obviously speaking about a small circle!"
