And as for the corners, I just click it out of O/D and then let off, and in the curve, I accelerate out and get some spin b4 I exit the curve. I have killed some camaros and mustangs like that, cuz they won't take 40 MPH curves at 60 MPH. I only take the curves faster if I know the roads tho and I test the car's ability on the roads I drive on. As far as each time, I gradually increase speed till it feels like I might lose it. I think driving like this improves my skills a bit, but I don't reccomend you do this right when u get your license.