at a light without using the antilag. stupid 2008ish 335xi trying to play with me. the results: mafix - 1 bmw - 0 rough road and killer stiff car - 1 i ate the bmw for lunch. no problems there. but my 140 dollar custom made vehicle speed sensor decided enough was enough and bailed out. lol. no matter, it wasn't working properly anyways. SATNAV FTW!