What was your embarrassing mistake as a brand new parent?

Here is mine:

We were celebrating my eldest daughter full moon. It means that I was just a month being a parent and was not experienced enough to change diaper. When we were eating and enjoying the food, my baby decided to poo. The restaurant didn’t have the baby changing room, so I decided to just change her on her baby trolley. Somehow, because of my inexperience, I didn’t hold up the legs tightly enough, and as the result her butt that full of s—t, touch the trolley and after that I could not even continue to eat as I was busy cleaning the whole thing as best I can.