When there is no ground in an underwater world, there should be a down current dragging mario down. It also pulls mario sideways 1 block next to hole. <img width="639" alt="Screenshot 2020-06-12 at 20 10 16" src="https://user-images.githubusercontent.com/433429/84533652-dbe79980-ace8-11ea-8ab8-2453dcc5b7ad.png">
When there is no ground in an underwater world, there should be a down current dragging mario down. It also pulls mario sideways 1 block next to hole.