SA-MP has a feature for server developers that detects where bullets hit. With it, you can determine what a bullet hits (like a vehicle, player, or object), and a set of coordinates the bullet struck relative to whatever was hit. I would like to see this for LU.
A crude version could probably be implemented with some of the client side functions we have already, but a natively supported function would be awesome.
This is a long shot, but I don't have time to work on it right now, so I'll just put it as a concept. Maybe an experienced scripter will come along and see it:
Perhaps we could calculate a bullet trajectory ... Screen to world position from crosshair, check incrementing distance until line of sight is not clear. At that point we could determine the bullet stopped there, and use the vector for something.
EDIT: by incrementing distance, I meant vector lerp.