if it can be attempted, someone wil have tried it
Don't laugh fellas, I actually saw pics somewhere of a helo a guy tried to fly into its hangar parking spot. He ran out of inflow air & pranged it, caves & tunnels should also be avoided for the same reason.
PS Can I come too Terry? Bet I can frighten you in a sim as much as I used to when you was the teacher & I was the stupid, sorry student.