Bring a Beetom down from above and freeze it in position to extend the runway. Keep a half-tile gap between the Beetom and the runway in order to extend it as much as possible.

Requires:

"h_canFrozenEnemyRunway"
{
  "or": [
    "Morph",
    {
      "obstaclesCleared": [
        "A"
      ]
    }
  ]
}
{
  "enemyDamage": {
    "enemy": "Beetom",
    "type": "contact",
    "hits": 4
  }
}

Exit condition:

{
  "leaveWithRunway": {
    "length": 11,
    "openEnd": 0
  }
}

Unlocks doors:

{"types":["ammo"],"requires":[]}