With a 2-tile runway in the other room, this requires a frame-perfect jump immediately before the transition.

Entrance condition:

{
  "comeInJumping": {
    "speedBooster": "any",
    "minTiles": 2
  }
}

Requires:

"canCrossRoomJumpIntoWater"
"canTrickyJump"

Clears obstacles: door_1

Dev note: This can be done with a slightly shorter runway (closed end), with a down grab, but that setup doesn't exist.