A Huey Cobra practicing autorotations during a military night training exercise had a problem and landed on the tail rotor, separating the tail boom. Fortunately, it wound up on its skids, sliding down the runway doing 360s in a brilliant shower of sparks. As the Cobra passed the tower, the following exchange was overheard:
Tower: "Sir, do you need any assistance?"
Cobra: "I don't know, tower. We ain't done crashin' yet!"