IIRC, There was a specific non-combat maneuver which, when removed from the
pilot's repertoire, cut the accident rate in half, for both models. It was
called, among other names, "bow to the crowd". It was done in a hover, and
was a tip the nose down and return maneuver that accentuated some instability
in the hover, and caused several crashes over the years.

YMMV.

Dave in Sandy Eggo