Round 15, 2011. We lost to Carlton by 103 points but were around 20 goals down at 3qtr time. I left shortly after 3 qtr time.
I had a pretty good go at forgetting it though. Picked up a bottle of Johnnie Walker on the way home, drank half of it, and woke up sleeping in the bath tub with a pillow the next afternoon. The hangover lasted 24 hours.
Fortunately I can no longer remember much about the game, but I know it happened, I know I was there, and I know it sucked.