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": 2
    },
    "canInsaneJump"
  ]
}
{
  "shineChargeFrames": 0
}
{
  "or": [
    "Wave",
    "Spazer",
    "Plasma",
    {
      "ammo": {
        "type": "Missile",
        "count": 2
      }
    },
    {
      "ammo": {
        "type": "Super",
        "count": 1
      }
    }
  ]
}

Unlocks doors:

{"nodeId":2,"types":["super","missiles"],"requires":[]}
{"nodeId":2,"types":["powerbomb"],"requires":["never"]}

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