damn man that sucks...it happened to my friends car once...we were doin his wheels and his back was jacked up on two jacks...one on each side and no stands...so i'm a little away from the car spraying his wheels and i tell him to go take the other wheel off so i can do it too...the retard didnt unloosen the lugs while the car was on the ground...so he starts jump on the bar to loosen the bolt and bam! the car fell too...hahaha i freaked out