When was a time you made a mistake that is especially memorable to you. What did you learn from it?

Hemm ... Well there was this one time I was petting my freind's goat. there was a gate, but it was an electric gate so that no animals or raccoons could go in and eat the goats. I ment closer to the goats so that I could pet them, but tthey jumbed, and i shocked myself. I learned that to checkand think before you act / and look at the expression around you