Oh you are NOT alone! Believe me! After a looong day at work, I got into my SUV, with my keys and stuff, started the engine, then a friend came out of the building, so I got out, and out of pure habit, hit the lock on the door, and shut it! Engine running! Called my husband thinking he had a spare key with him, no, so had to call a locksmith. Took 20 minutes for him to show up and I was soooo embaressed! He said it happens all the time!