Filmed entirely in San Diego, California using two ambulances from a defunct private ambulance company (Star Ambulance). The red "DIC" ambulance is painted with the scheme for Rural/Metro ambulances (San Diego City's contracted 911 service), while the blue "BALS" ambulance maintains the color scheme of Star Ambulance. Throughout the movie it can be seen that the interior door jambs of the red "DIC" ambulance are in fact the same blue color as the "BALS" unit.