Perform a Crystal Flash in order to put energy into reserves. Position below the door, jump when Samus reaches 7 Energy, and mid-air morph, timed so that reserves trigger while Samus still has upward momentum just before Samus would hit the door. If done properly, the R-mode standup will cause Samus to clip past the door shell.

With a mid-air morph, this has a 5-frame window for the jump. If Spring Ball is available, jumping in Spring Ball increases the window to 6 frames. In either case it may help to pause abuse: instead of jumping at a precise Energy value, set reserves to manual, wait until Samus is close to zero Energy, and press pause a moment before jumping, so that Samus is at 0 energy and in position just below the door when the pause hits. Then set reserves to auto (and re-equip Varia if available) and unpause.

Entrance condition:

{
  "comeInWithRMode": {}
}

Requires:

"h_heatedCrystalFlash"
"canRModeStandupClip"
"canInsaneJump"
{
  "heatFrames": 280
}
{
  "disableEquipment": "Varia"
}
{
  "autoReserveTrigger": {}
}
{
  "heatFrames": 5
}

Bypasses door shell: true