If only 2 tiles of runway are available and it is not possible to unlock the opposite door, then this requires a double frame-perfect stutter: run toward the door, release forward for exactly 3 frames, pressing forward again on the last possible frame before the transition.

Entrance condition:

"comeInStutterShinecharging": {
  "minTiles": 2
}

Requires:

"canPreciseStutterWaterShineCharge",
{"or": [
  {"doorUnlockedAtNode": 1},
  "canInsaneJump"
]},
{"shineChargeFrames": 0}

Unlocks doors:

{"nodeId": 1, "types": ["super", "missiles"], "requires": []},
{"nodeId": 1, "types": ["powerbomb"], "requires": ["never"]}

Dev note: FIXME: canInsaneJump is for difficulty placement; replace with a more appropriate tech since no jump is involved.