It happens. I went to take the trash out once wearing not more than a nightgown. Quick in and out type of thing. The main door into the building shut behind me. Luckily I live in apartment building so I buzzed my neighbors and they let me in.

Another time I somehow locked myself out of my apartment. Still not sure how I did that. I learned to pick a lock that day (since apparently a locksmith would've cost like $150)