The most recent one was yesterday. I was supposed to board a plane first thing in the morning to go home for the week, but I got to the airport to promptly find that I'd left my wallet at my apartment, meaning that I had no form of ID on me, in turn meaning that I couldn't get past the security checkpoint.
So yeah. I'm staying in Norman 'til Tuesday morning, because that was the earliest flight they could book me on.
I have effectively halved the amount of time that I get to spend with my family over spring break, just because I forgot to grab my wallet as I walked out the door.