It happened recently, I was at the Taekwondo gym with my referee team. I was referee for taekwondo. While I was judging on the battlefield, Players are fighting fiercely, But My shoelace has dropped. I don’t know and I was judging. At that time, I avoided one player. Well, I stumbled on a shoelace and back into the battlefield. Cheers changed to laughter. I was very embarrassed, But I have to stand up and judging to finished.