lets see....
no breaks on car...someone else is useing your car,so you have no car to use.... sick... family death.... ummm.. call from someone elses cell phone in a car and make it sound like your somewhere else like in california or something... i like that coke one...
or you could just cry histerically and say that you just don't want to go. (only about 10% effective)
That should help...
--Katie