I was in a bar in Belgium once, a place called Poperinge, and I had a full 750ml (wine bottle size) of some delicious gueze to myself after seeing it on the menu.One thing lead to another and I ended up having a 12.4% 750ml bottle of bourbon barrel aged orange chocolate stout to myself.
What I didn't see was the percentage, so when I ordered the next round the gentleman behind the bar lambasted me as it's meant to last the entire evening.
I think I'd had about five swigs. Ooops....