But... some stuff should still work the same.

[Sand works the same. The sky... no, never mind. Definitely never mind that part. The trees are still trees and boars are still edible and keel over if you drop refrigerators on them. That being said, the water sure isn't going anywhere -- even if he leans out over the edge of the sand bar, he can't see anything flowing down below...]

If it's not a force field, you'd fall through.

[Great for swimming, guys.]