What have you ever done to make you remember the shame of your life?

In primary school, some people would laugh at me for being short, but I couldn't refute it, because I was really short at that time, so I didn't say anything more. Someone will bet me how tall I am with a pack of cigarettes after work. When I knew, I had a hard day and went home to cry. This also needs to be nothing to others, but I will remember it for a lifetime.