While reading about the evolution of the camera and pushing away from the wall (or not) it strongly reminded me of the game Tremulous. The initial alien class is a very short spider that moves very quickly and can walk on walls. When running into a corner the camera does a (user-adjustable speed) rotation. The same happens if you jump into a wall. But in this game the solution seems to be more direct- you are always headed straight for a wall, and there seems to be much less wall-walking as "wall-flinging."