OnControllerHit

void OnControllerColliderHit(ControllerColliderHit hit){

    //Did we hit a wall? Did we hit it from the side and not from above or below?
    if (!characterController.isGrounded && hit.gameObject.tag == "Wall" && !AlmostEqual(hit.normal,transform.up,0.1f) && !AlmostEqual(hit.normal,-transform.up,0.1f)) {

        //Is this the same wall we hit before without landing in between?
        if (lastHit == null || !lastHit.gameObject.Equals(hit.gameObject) ) {
            {
                //Save what direction is away from the wall
                forbiddenMove = hit.normal * movementSpeed;

                //Make sure we are allowed to jump again even if we havent touched the ground.
                canWallJump = true;

                //Make sure we are stuck to the wall
                stuckToWall = true;

                //This hit is now considered the "lastHit" so this only can happen once per wall and jump.
                lastHit = hit;

                //is the wall on the players left or right? Tilt the camera that way and play the wall-sound in that speaker
                if (AlmostEqual(transform.right, hit.normal, 1f))
                {
                    targetCamTilt = Quaternion.Euler(0, 0, -10);
                    sounder.PlayWallSound(-1f);
                }
                else
                {
                    targetCamTilt = Quaternion.Euler(0, 0, 10);
                    sounder.PlayWallSound(1f);
                }
            }
        }
    }
}