Leaving with upward momentum is possible in three ways: 1) Most easily, with a momentum-conserving morph against the ceiling through the transition, 2) With a momentum-conserving turnaround through the transition, or 3) Jumping specifically with a extra run speed $5.2 or $5.3 and aiming down through the transition. For the first two methods, avoid backing into the corner at the start of runway; instead press against it and turn around, to put Samus into a better position.

Requires:

{"obstaclesCleared": ["A"]},
"h_speedJump",
{"or": [
  "canMomentumConservingMorph",
  "canInsaneJump"
]}

Exit condition:

"leaveWithSidePlatform": {
  "height": 2,
  "runway": {
    "length": 45,
    "openEnd": 1
  },
  "obstruction": [3, 0]
}

Dev note: Max extra run speed $7.0. Using the full runway, there is a 4-frame window for the jump, then between a 1-frame and 4-frame window for the morph depending on the jump (with later jumps giving more frames for the morph). If there is a solid tile on the ceiling in the next room past the door frame, then the windows for the jump and morph are tighter. The momentum-conserving turnaround has a 3-frame window for the jump, and between a 1-frame or 4-frame for the turnaround (with later jumps giving a larger window for the turnaround); again the windows can be more narrow depending on what is required in the next room.