Ah yes, the “Waterfall Paradox”.
If there is no secret behind the waterfall: “Are you kidding me? How could they not put something behind this waterfall?”
If there is a secret behind the waterfall: “Of course they went with the lazy trope of putting a secret behind the waterfall. Typical!”
Yup. And if you want to look up more info on how to do it correctly, look up hard drive shucking.