As I look at the film I get the idea in my head that it all happened so quickly that the pilot may not have had time to get the collective down (startle effect being a known phenomenon) before it all went horribly wrong.
Scary thing is, if it was the Van Horn bounce, putting the collective down only makes things worse. The info letter put out about it less than a month ago says the harmonic is the same natural frequency as the tailboom.
Van Horn 206L MRB IL
Pictures I've seen of a suspected VH bounce that got on the ground has severe damage in the same area of the tailboom that was the break point on the New York machine.