From the ArcaMax Publishing, Jokes Newsletter:
http://www.arcamax.com/news/jokes/s-183112-957580
As he was drilling a batch of recruits, the sergeant saw that one of
them was marching out of step. Walking up next to the man as they
marched, he said sarcastically: "Do you know they are all out of step
except you?"
"What?" asked the recruit innocently.
"I said -- they are all out of step except you!" thundered the
sergeant.
The recruit replied, "Well, sarge, you're in charge -- you tell them!"