• Proned Movement Issues -----

While Proned, pressing Ctrl+S(Back) causes the player to lean onto his right side. Currently only a lean to the right side is supported.

While Proned, Pressing Ctrl+D(Right) will cause the player to crouch up.
While Proned, Pressing Ctrl+W(Up) will cause the player to lay on his back.

This current configuration can confusion for players, especially when in a firefight. This is certainly unwanted behavior. I would suggest the following for a more realistic movement system while proning.

• Theoretical Solution -----

While Proned, pressing Ctrl+S(Back) will cause the player to lay on his back.
Thus, eliminating confusion. (Pressing back, lays you on your back.)

While Proned, Pressing Ctrl+D(Right) will lean you to your right side.
While Proned, Pressing Ctrl+A(Left) will lean you to your left side.
A leaning to the left animation would have to be added.

While Proned, Pressing Ctrl+W(Up) will switch the character back onto his stomach.