IF it was MB:
FW jocks wouldn't do anything at all if a donk stopped in their multi engined a/c, the autopilot would trim and slow automatically
.
He might have reacted this way and just did nothing.
In a helo (single and twin), instinctively a rotary pilot would lower the lever to contain Nr (we would all agree on that little baby!) and in so doing, the a/c would pitch down automatically due to the impingeing air from below on the stabilisers. Most helo pilots end up having to contain the amount of nose down that occurs for this very reason.
So, mast bumping/tail cone contact could easily occur during this nose down episode and/or by overcorrecting the pitch down by too much aft cyclic.
He may have reacted this way.
In a Robbie - an uninitiated FW pilot would have his work cut out.