This always happens to me!!! Have you ever been alone in public and just remembered something so random?

I love to laugh. I have been blessed with a pretty amazingly funny family. My brother comes home from work with a new story for me everyday. Sometimes, his stories are just over the top HYSTERICALLY FUNNY. Ok, so I'm at work today and it slowed down. Then I just started remembering some of the funny things my brother said. I couldn't contain myself and I started laughing. I'm standing alone, mind you and there is no one around me but customers. At least if a co-worker was around me I could have played it off. I couldn't hold it and the more I tried to hold it, the more I wanted to explode with laughter. I looked pretty cooky. This always happens to me. Does this happen to anyone? If so, can you please share your moments with me and what you did in the situation? Thanks.