I backed out of a parking space, put my foot on the brake and shifted into Drive to finish maneuvering out of the space. Although I didn't remove my foot from the brake, my Forester immediately accelerated at extremely high speed, striking the two cars parked next to me, and seriously damaging both. Rather than slowing down after hitting the other two vehicles, my car continued to speed up, only coming to a stop when it hit, head-on, a cement barrier surrounding the lot. My car hit with such force that every airbag in it deployed, and its front end was totally destroyed. No one was in the other two cars; I suffered minor injuries.