@moyeon, You felt embarrassed by something that could have happened to any of your classmates and I assure you that it would have happened to more than one if they hadn't removed that nail.

Young people in schools always look for a way to joke or bully others, that is common.

You laughed at me I imagine because of the nerves although I tell you, you were lucky since you were not injured with the nail.

Although you did make your family nervous, I thought it had been something more serious and it was something irrelevant, just a small cut on the blue jean.

As you say, it is very difficult for me to go through that situation again since now you will be aware of where you sit

I say goodbye wishing you have a happy day