Two incidents come to mind (DS is recently potty trained, which apparently opens the door for all kinds of embarrassing moments.)
At a bridal shower for a good friend last weekend DS shouted to a crowded room of ladies, "Mommy do big poopie." I was wearing a bright pink dress and I think my face turned the same color.
At the crowded park yesterday, DS had to pee and with no warning, whipped it out and began to pee all over the slide. Apparently he didn't pull his pants down far enough, so there was pee flying everywhere. I rushed over, totally flustered, and tried to help, although I wasn't really sure whether I was pulling his pants up or down. We both ended up with hands, feet, and clothes soaked in pee. And we'd walked to the park in the Ergo, so I had to put a pee soaked toddler on my back and trudge home.