Entrance condition:

{
  "comeInRunning": {
    "speedBooster": true,
    "minTiles": 3
  }
}

Requires:

"canMomentumConservingMorph"
"canSpringFling"
{
  "heatFrames": 140
}

Dev note: The momentum-conserving morph is not strictly required (particularly with longer runways) but makes it easier.