I was doing the Step Up For Kids, which is an 82 floor stair climb up the Aon Center in Chicago.
About half way up, I paused and said to one of the kids lapping me "wow, you are doing way better than I am".
She responded back "yea and I have cancer".
Got my second wind right there and flew past that little shit. (Not really, but it did motivate me to shut up and finish)