graveyard spiral
n.— «I don’t remember ever hearing of a single crash due to an accidental, recoverable spin. Pilots get killed in graveyard spirals…but they aren’t spins, and the root cause is not the airplane.» —“Re: American Aviation!” by Ronald J. Wanttaja Usenet: rec.aviation Jan. 22, 1990. (source: Double-Tongued Dictionary)