Lu, the brave individual was going under a hovering helicopter. Sorry if I wasn't clear on that.
I don't think there would be any pitch/flap coupling as I thought that this unholy rigid head didn't flap.
Dave said, “Both the longitudinal and the lateral component of the lift vector will not be in line with the mass while an upward vertical motion is taking place on the tail. When this motion stops both lift vectors will realign with the mast.”
There is not a longitudinal and a lateral component to the lift, there is only the one vector. Decomposing that vector into two orthogonal vectors is a tool that often makes the physics easier to deal with. In this case, decomposing it means you have to add two more spins to the already spinning and rolling system. I'd just stick to one.
Lu is right that the response in this example is purely gyroscopic. If it were in a vacuum the same left roll would occur after our brave individual pushes up on the tail. Of course, in the vacuum there would be little left of our brave individual, not even considering the helicopter that's bound to fall on him.
Matthew.