i dont try an kill em(ok maybe i went too hard on the supra with 11psi)but the other cars i drive normal,300m is slow as balls but nice to drive,the regal a friend gave to me an is ghetto fabulous(actually want to kill it,but can sell for a good chunk of money).i just have horrible luck!maybe its got something to do with that mirror i broke 5 yrs ago lol.