If Samus runs into the room and quickly destroys the shot block, a Kihunter will immediately fall down. To avoid this, either spin jump into the room, or wait a moment before shooting the block.

Requires:

{
  "resetRoom": {
    "nodes": [
      2
    ]
  }
}
"canDodgeWhileShooting"
{
  "or": [
    "HiJump",
    "canWalljump",
    "h_crouchJumpDownGrab",
    "SpaceJump"
  ]
}
{
  "or": [
    {
      "and": [
        "Plasma",
        {
          "cycleFrames": 480
        }
      ]
    },
    {
      "and": [
        "ScrewAttack",
        {
          "cycleFrames": 570
        }
      ]
    },
    {
      "and": [
        "Wave",
        {
          "cycleFrames": 660
        }
      ]
    },
    {
      "and": [
        "Spazer",
        {
          "cycleFrames": 660
        }
      ]
    },
    {
      "and": [
        "Charge",
        {
          "cycleFrames": 780
        }
      ]
    },
    {
      "and": [
        "Ice",
        {
          "cycleFrames": 840
        }
      ]
    },
    {
      "and": [
        "canTrickyDodgeEnemies",
        {
          "cycleFrames": 1200
        }
      ]
    }
  ]
}

Clears obstacles: C, D

Resets obstacles: A, B

Farm cycle drops: 4 Kihunter (green)