If it's a round thing it might well disappear. Even with full understanding that things don't cease to exist when they leave your field of view, "where do thing

If it's a round thing it might well disappear. Even with full understanding that things don't cease to exist when they leave your field of view, "where do things end up if I drop them" is a pretty big field to experiment with. Youtube is full of videos of adults doing the same, just from more extreme heights or other unusual scenarios (since as adults we have a solid grasp of the simpler scenarios)