My brain invented a new car. I was driving a twin turbo V10, rear-mid engined, single center seat, closed cockpit Audi (Kind of like an Egoista with a much more subtle body style). It had a button on the dashboard that was labeled "4M". When pressed, the engine note became much louder, the suspension tightened up and the steering became quicker. The interior was lined with alcantara and the seat was diamond stitched.