That sucks. I had a deal like that pickin my Brother from school one day in my camaro. Just had a whole new exhaust put on and as we were headed out of the parking lot and they had some cheap speed bumps in it that were held in by railroad spikes. Well one had started workin its way out and caught my muffler and brought my 3700 lb camaro that was movin about 20-25 mph to a halt. Went to the school board and they took care of it.