Car toys door popper kits???

Hey does any1 kno if its true about a door popper kit that car toys makes that supposedly it doesnt have a remote but rather a "magnet" that u run along side the front windshield ( or whereever u ran the kits wire) and that causes ur doors 2 pop?? Some1 told me that car toys makes such a kit?? or is it another company?? or does that kind of kit even exist?? thanx l8r