Mass, what mass? As I hurled 4500 lbs. of rippled and flared German steel through a long, sweeping, belt-cinching corner, I felt like I was playing a driving simulation. Thanks to its improved active body controls, the Mercedes Benz CL63 AMG remained absurdly unaffected by the enormous lateral g-forces generated by its gyrations. Lacking suitable anti-gravity aids, my passenger and I were thrown towards the outer radius of the turn, welded to the CL63's seat bolsters. Now that's what I call fun.