What's the crater in the mountain shown after Izuku talks to Kota in season 3 episode 3? In My Hero Academia last episode, after Izuku talks to Kota, they show a sort of crater in the mountain. Does the manga say anything or help to guess what this could be? Does this have any relation with Kota?
It's his quirk, 


   water creation.


He doesn't really do much with it.