"Trouble Shooting?" joke

One of Microsoft's tech support reps was drafted and sent to
boot camp. at the rifle range, he was given some instruction, a
rifle, and bullets. He fired several shots at the target. The
report came from the target area that all attempts had
completely missed the target.
The Microsoft tech rep looked at his rifle and then at the
target again. He looked at the rifle again, and then at the
target again. He put his finger over the end of the rifle barrel
and squeezed the trigger with his other hand. The end of his
finger was blown off, whereupon he yelled toward the target
area: "It's leaving here just fine. The trouble must be at your
end!"