Use Screw Attack to break the bomb block by entering from a non-water room with a last-frame spin jump, and make it to the platform below the top door. Longer runway lengths can also work, up to 17 tiles, but will make the trick somewhat more precise. Use angle to break spin, and do a momentum conserving turnaround either on the same frame or one frame later; this first turnaround should be done early enough that the turnaround is complete by the time Samus clears the two-tile passage in the middle of the room. Do a second momentum conserving turnaround somewhat late, and by switching from holding left to holding right one frame later (a perfect 'boomerang').

The optimal amount of extra run speed is between $3.2 and $3.5, by using 13 tiles of runway or about a half tile more or less; this gives a 7-frame window for the first turnaround, and typically a 4-frame window for the second turnaround if the first turnaround is done early enough. Extra run speeds between $3.6 and $3.F can also work, but with shorter windows. A perfect boomerang is always required for the second turnaround, regardless of where in the window it is done. It is recommended to buffer the spin break, by holding angle (up or down), jump, and forward through the transition, then switching from forward to backward, with at most 1 frame of neutral in between, while still holding jump and angle.

Entrance condition:

{
  "comeInJumping": {
    "speedBooster": true,
    "minTiles": 12.4375
  }
}

Requires:

{
  "notable": "Cross Room Jump Boomerang To Top"
}
"canInsaneJump"
"canCrossRoomJumpIntoWater"
"ScrewAttack"
"canMomentumConservingTurnaround"
"h_trickyToCarryFlashSuit"

Dev note: This does not have collision oscillation.