That's pretty interesting. Maybe I really don't need it. What actually knocked mine loose was the window hitting it every time the door was shut, so obviously my window is too high, and I was planning on adjusting it prior to installing the new clip so I didn't knock the new one off too. Maybe adjusting the window will be good enough!
BTW, that's a cool pic of your car in action in front of the Porsche. It has a nice stance.