To be able to break the glass and leave out the left side, Samus must be at a specific horizontal X pixel position ($63). Therefore, the Crystal Flash should have been performed at this position; For the moondance, moonfalls must be performed only left-to-right, or Samus will fall out. After 176 moonfalls, Samus will clip down into the tank. Angle down and fire 18 Missiles into Mother Brain to break the tank. If Samus is correctly positioned, she will then fall out and be free to move to the left.

If Samus is at position $62 (a pixel to the left of the correct position), it is possible for a Rinka hit to knock back Samus into position $63.

Requires:

{
  "notable": "Moondance Clip"
}
"Wave"
"canTrickyDodgeEnemies"
{
  "or": [
    "Ice",
    "canBeExtremelyPatient"
  ]
}
"canMoondance"
{
  "enemyDamage": {
    "enemy": "Rinka",
    "type": "contact",
    "hits": 1
  }
}
{
  "ammo": {
    "type": "Missile",
    "count": 18
  }
}

Dev note: FIXME: Using some Supers in place of Missiles could be possible, but if too many are used it might trigger the fight cutscene.