In R-Mode, kill the Coverns until there is Energy in Samus's Reserves. Get into the Morph tunnel and go to the far left. Wait for Coverns to damage Samus down until Reserves trigger, forcing a stand up and enabling her to shoot the shot blocks and escape.

Entrance condition:

{
  "comeInWithRMode": {},
  "comesThroughToilet": "any"
}

Requires:

{
  "not": "f_DefeatedPhantoon"
}
"canRiskPermanentLossOfAccess"
{
  "or": [
    "canBePatient",
    "Plasma"
  ]
}
{
  "or": [
    {
      "and": [
        "canCarefulJump",
        "canMidAirMorph",
        "canDisableEquipment"
      ]
    },
    "h_canUseSpringBall"
  ]
}

Clears obstacles: B