TC . All quite possible but two things don't stack up .
If he fell , free fall , the whole way he would have lost his hydraulics much earlier ? Or ( excuse my ignorance ) is there a reservoir as in the 350 , which will give you two or 3 major cyclic movements with assistance ?
In a free fall the chances of landing correct way up must be small ?
Circa 200mph onto a roof surely would destroy the aircraft ??!!!!
Other than that .... Perfect theory