Follow the crab from the bottom right door to the top left door. It is also possible to knock the crab off of the middle peak with a super and follow it.

Requires:

"h_frozenEnemyRunway"
"Gravity"
"canBeVeryPatient"
{
  "or": [
    "canGravityJump",
    "canPreciseGrapple",
    {
      "ammo": {
        "type": "Super",
        "count": 1
      }
    }
  ]
}

Exit condition:

{
  "leaveWithRunway": {
    "length": 4,
    "openEnd": 0
  }
}

Dev note: These strats take approximately 2 minutes each, but because it is just for a 1.5 tile runway extension, canBeVeryPatient was added. This could be done with many other sets of item combinations, but it would be very tedious for a runway extension.