Turn around to the right just before bonking the ceiling, to retain upward momentum. Then morph and go through the tunnel to the right.

Entrance condition:

{
  "comeInSpaceJumping": {
    "speedBooster": false,
    "minTiles": 3.5625
  }
}

Requires:

{
  "notable": "Cross Room Jump Morph"
}
"canCrossRoomJumpIntoWater"
"canPreciseSpaceJump"
"canMomentumConservingTurnaround"
"canMidAirMorph"