Hacker at the event.

Im sorry the Demo is that bad... but if you look close you can see him running around down on the water and a sec later he is up at the YoYo mobs. and he used the same trick 2 min later at the end of the event. And on nr 2 movie you can see it clear but you just have to look really good becouse it happens withing the first 2 sec .

The players name is Gomic

https://www.youtube.com/watch?v=tqA55TmjW7Q

https://www.youtube.com/watch?v=_AUJsv99JQ0

Looks like auto unstuck.