I left vehicle running on my concrete driveway while I ran in the house to get my father for an errand. When I came outside and went to get into the vehicle I noticed a fire in the front of the rear wheel on the driver's side kind of dripping flames from the vehicle on to the concrete. Luckily I reacted quickly enough to release the parking brake. [Car is a manual transmisson]. The car drifted forward [driveway has small downhill pitch]and I turned the motor off. Then I [luckily] ran over to a hose and brought it to the vehicle to extinguish the fire.