[SPOILERS] Secret in Top Floor

[things viral is the best album]

In the room where the door to Maulbuster's fight is, there's a hidden passage you have to access by going to Smallbuster's door, rolling off of the slope there, then jumping into the Maulbuster door room while you're still rolling. This hidden passage has a secret room called "Skeletons in the Closet 1" or something like that.

There's this conveyor belt going really fast that you have to use to build up speed via clutch boosting, and under it, there's a missile dude shooting missiles for you to jump off of with the hammer vault. If you follow the missiles leftwards, you'll find this floating rock thingy. There's another floating rock to the left off-screen, but I can't jump to it no matter what I do. I feel like it's possible, but I just can't do it either because of a skill issue on my part or just not knowing some obscure tech or something.

Anyways, my point is this: can any of y'all check this out? I want to know what's beyond the floating rocks. Please and thank you.

[7k]

There isn't enough room to get the speed you need on the first rock to make it to the second, so you want to build up just enough speed on the treadmill that you can make it to the first rock in a single bounce and immediately dash jump to make it to the second rock.

[LucasIV]

Boost to like around x6 on the treadmill, then jump off when a missile is at the edge of your screen. If you have too much boost you might overshoot, you can press down to quicken your fall when spinning if that happens. Maintain your boost to the next platform, then bounce on it for extra height.
If you fell off during hammer spin, it's possible to maintain your boost when you land back to the room reset if you quickly clutch as you hit the ground so you don't need to build up boost again. Good luck on this one, I just finished the whole thing yesterday