Incapacitated pilot
In the case of an incapacitated pilot, I can see one of the medical crewmembers pulling back on the cyclic in a last ditch effort to pull out of the fatal dive at the last second. This may have been responsible for the flare or leveling off before impact. If the crash investigation evidence shows an unrestrained med crewmember at time of impact, this may be the reason. Usually in cruise they would be strapped in.