I can kind of top that as far as disappointment goes.
I've posted this story on here before, so apologies if it's repetitive. I was living in Knoxville and one of my best friends has a wedding that day. The wedding will cause me to miss a bit at the beginning, but I'll be at the hotel bar by the 2nd quarter. No big deal. IIRC, Arky jumps out to an early lead. I'm heading to the hotel ASAP. Get there and the GD bar is closed. There's no TV coverage. The reception (and drinking) begin. I'm trying to figure something out when one of the guys at the wedding says something along the lines of, "Bummer about Texas being down 35-6 at the half". What!? F it, I'll just drown my sorrows in beer. I proceed to get hammered and mostly forget about the game.
Get home late that evening and am curious about WTF happened. Rewind the VCR. (Yes, I was the last person in America still using one.) Hold up. It's not 35-6 at half. It's 21-14!! Holy S! Does this mean would might have actually won? Nope. Proceeded to watch the 2nd half of that disaster. Essentially, I got to experience Texas lose to arky twice in one day.