I did the same on my honda. Started car, then went back into the house to get something and locked the car by mistake with the engine running. Called locksmiths but they wanted too much money and couldn't get here for several house. Though about breaking window, but probably cost more to repair than locksmith. Called a friend and he told me to go to Honda dealer with your registration and they will cut you a key to get in the door. Only about 11 buck. Hopped a ride to the dealer, got the key and was able to get car open.