Quote from DANIEL-CRO :2. in replay bf1.mpr you can see my car fliped and when I'm not moving axis, after about second my wheels frezze and shows speed 0 kmph, but when I move axis it shows real speed. This bug has already been reported by me in this thread. Quote from Flame CZE :Yes, you are right, but I am afraid that this is an optimisation rather than a bug, so I don't expect Scawen to change it. I'm afraid you're wrong, as I said in another thread, this is bug in optimization. Quote from adamshl :Physics calculations should be suspended only if both conditions are met (engine is off and wheels do not spin). Looks like Scawen forgot about the second condition. But I agree in part that it will not be quickly fixed, this is not a serious bug.