The new draftee refused to march with his squad. Instead, he rode his invisible motorcycle beside them while making motorcycle noises. After a few weeks of this and several psychiatric exams, he was given a discharge. He rode his Hog to the main gate, propped it up on its invisible stand and walked out. "Hey," called the gate guard. "You forgot your bike."
"No," replied the draftee, "I'm leaving it for the next guy who wants to get out."