2 hits are expected to be taken. The first can be either from a Sidehopper or from a spike. Second hit will be from a Sidehopper. It is possible to avoid the first hit by opening the door and standing in the doorway while killing the first hopper.

Requires:

{
  "enemyDamage": {
    "enemy": "Sidehopper",
    "type": "contact",
    "hits": 1
  }
}
{
  "or": [
    {
      "enemyDamage": {
        "enemy": "Sidehopper",
        "type": "contact",
        "hits": 1
      }
    },
    {
      "spikeHits": 1
    },
    {
      "and": [
        {
          "doorUnlockedAtNode": 1
        },
        "canDodgeWhileShooting"
      ]
    }
  ]
}