Literally realized, "how will I put this stuff in the car in order to have my hands free to grab the keys if I don't have the keys" and turned around just in time to see the door fully closed.

And I always turn the latch to lock itself when I step outside, or I'd never remember to lock the door.

Thank goodness for the hide-a-key with a house key stuck in the filth on the underside of my car.