Kupo

The number one threat when doing a vertical landing is probably entering a vortex ring state. If you descend too fast, you will be unable to get lift by increasing the collective and fall down like a rock. One way to land is to do get down low during the approach, decelerate and enter a auto-hover above the area where you want to land being careful to try to keep your current altitude. Finally slowly descend (1 m/s or less preferably) until you touch ground.

Well, this is what happens when a stinger missile comes through your windshield: http://img247.imageshack.us/img247/7370/kiams4.jpg So I don't really think it would be worth it to model damage to the inside.