All I can say is that this looks unbelievably badly organized.
Where the hell are the rescue/safety boats?
These kids don’t seem to be wearing any kind of flotation devices, the course isn’t overly well marked.
No rope between the pillars to stop spectators falling/being pushed in.
This is a total disgrace and could have been much much worse.
On the plus side, I actually laughed out loud and found that watching this was worth my time and made my day.