Space Jump into the room relatively low through the doorway. Do a momentum-conserving morph to avoid bonking on the corner at the edge of the sandfall. The morph should happen relatively early, in order to avoid an Evir projectile hit.

Jump into the room with extra run speed of at least $1.B At low speed, Samus may not make it onto the pillar and will not have time to unmorph until close to the sand; in this case, crouch jumping can be the safest way to escape.

Entrance condition:

{
  "comeInSpaceJumping": {
    "speedBooster": false,
    "minTiles": 5.4375
  }
}

Requires:

"canPreciseSpaceJump"
"canMomentumConservingMorph"
"canTrickyDodgeEnemies"
"canPlayInSand"

Dev note: Lower speeds can also work (as low as $1.4), with damage from an Evir projectile.