For the record, during run up and coast down (especially coast down) the blades can go very far from the nominal path. This is true of teetering, articulated and some rigid rotors. As the rotor passes thru the first flapping frequency (usually about 35 to 40% Nr) the wind excites the upwind passing blade which sails upward, then crashes down when it is pointed into the wind. This is repeated for each blade as they pass by, with the tip path excursions getting larger and larger. On one European aircraft, several incidents of blades striking the deck have been experienc3d in winds of about 35 knots!
Rule of thumb, NEVER walk under a rotor when it is starting or shutting down.