"Telephone man in the army" joke

A telphone man joined the Army. As part of his basic
training, he went out on the rifle range. He fired 99 shots at
the target, and missed the target with every shot! His Drill
Instructor tried to find out why.
"What's the matter with you?" asked the DI. "Why can't you
hit the target? What were you in civilian life?"
"I was a telephone man," replied the new recruit, "and I
don't know why I can't hit the target. Let me see..."
The telephone man checked his rifle, checked his rifle
again, and checked his rifle a third time. He then put his
finger in front of the muzzle, pulled the trigger, and blew the
end of his finger off!
"Well," the phone man said, writhing in pain, "the bullets
are leaving here fine. The trouble must be on the other end!"
Bruce Stein on the Line