The Boyz's flying chair flew away even though they told us to stay still

I was wondering how tired I would be if I arrived at the pool at 1 AM and I was also worried that the flying chair would be dangerous.
The members' expressions were half anticipation, half fear, and it was 1 AM, so they did a proper warm-up.

When Younghoon was chosen as the first test rider through rock-paper-scissors, there was a moment of silence when Younghoon got caught, and his expression when he flew away was so realistically terrifying that I'm careful every time I watch this, but I wish people would be a little more careful with this kind of content because they might get really hurt.