you know, garage door opener and pointed it at the compartment and snapped it. they closed the hood and off they went, no often. >> he points on the national highway transportation safety administration for proof. a test where the for platt is jammed on the accelerator. he does anything he can to stop the car with no results. the conclusion? it's the floor mat. they say it's not the way to test. >> if you're going to investigate whether or not the electronic controls are faulty, you have to do a scientific laboratory test, and they didn't do it. >> reporter: inside the electronics lab at the university of maryland's clark school of engineering, professor mike peck specializes in laboratory controlled interference testing. he says with today's continually changing car components, parts