The B-47 used to practice an immelman "toss-bomb" maneuver to escape the nuclear blast. This was discontinued due to excessive stress on the wings.
A modified AF Systems Command NKC-135 (with upper and lower longitudinal radomes mounted forward of the wing) unintentionally did a lateral departure followed by one full turn of a spin during an inflight minimum control speed test. The crew recovered from the ensuing dive, but one outboard engine had been slung off.
