Here's mine: My boys love trains. We go to this outdoor train place once a year. It has all these different sized trains to ride (Big steam engines, smaller engines and tiny ones that you sit on top of).
We were there and I had to nurse my middle child. There was no place to do it. The car wasn't close, it was packed and I couldn't find a place to sit - so I looked around and saw that the mid sized train had a box car you can ride in. It was a tiny boxcar, though, so I didn't know if it would work.
So, DH, my oldest son, baby and I stood in line and grabbed the box car. It was a tight fit but the 4 of us fit in it, we were completely incognito in there and kind of smushed...but it worked fine! And to this day when we go back there we always laugh about it!