If needed, use a hero shot to open the door with a running jump, then turn around mid-air to land back on the platform.

If needing to leave with Speed Booster tricky dash speed ($2.0 or $2.1), it will be necessary to begin with Speed Booster unequipped, then equip it after jumping.

Requires:

"canHeroShot"
"canTrickyJump"

Exit condition:

{
  "leaveWithMockball": {
    "remoteRunway": {
      "length": 7,
      "openEnd": 2
    },
    "landingRunway": {
      "length": 4,
      "openEnd": 1
    },
    "minExtraRunSpeed": "$1.E"
  }
}

Unlocks doors:

{"types":["ammo"],"requires":["never"]}

Dev note: With Speed Booster equipped, speeds as low as $1.B can work.