Crab and Nick: I disagree - the roll CAN be stopped by lowering the lever - it's not called "dynamic" for nothing as it's a pilot induced prob in the first place . I imagine a little before the CG moves to the wrong side of the grounded skid the inertia could send the thing over, certainly after that point it's all academic, but that angle is a helluva lot and until then, gravity is definitely on your side! The instinctive response, as Shawn has already said, should be to lower the collective...