The Boat/Rock Brainteaser ft Simone Giertz part 2/3

The water level will go down! This is a classic case where extreme cases should be utilized. Imagine the rock is really dense an heavy. When it's in the boat, it will displace an amount of water equal to its weight, which is a lot. Then when you drop it in the lake, it will only displace the amount of water equal to its volume, which is less than in the previous scenario.

Hey, ain't I smart?
No, i just remember physics girl has explained this riddle before in a previous video. I'm still stupid af. xD But do i at least get bonus points for being a long time viewer?