A soldier walks around the orderly room like hes looking for something day after day he keeps doing this, but never finds anything.
One day they hand him a section 8 to wit he replys: "There it is"
Another GI near the orderly room makes like he starting up a motorcycle, but theres nothing there, at last he gets a section 8.
The SGT asks him about his bike, he replys: "I'll leave it there for the next guy"
The term Section 8 refers to a discharge from the United States military for reason of being mentally unfit for service. This term was made popular by the television program M*A*S*H, in which a corporal in the US Army, Max Klinger, attempts for years to get a Section 8 discharge (usually by wearing women's clothing), in order to get out his tour of service of the Korean War.
The Section 8 discharge sought after by Corporal Klinger in M*A*S*H differs from a real Section 8; Klinger is attracted to a Section 8 discharge because on the show, it is considered a medical discharge and not a dishonorable discharge. The Section 8 has also been referenced in the book A Separate Peace, the book (and later movie) Catch-22, in the movies Full Metal Jacket (due to the excessive masturbation habit of a Marine nicknamed "Handjob") and Jarhead, and in an episode of Family Guy, in which Stewie briefly parodies the Klinger character. There is also a group of investigators identified as "section 8" in the movie Basic.
Read the full article in the Wikipedia: Section 8 (military)