Break the shot block before reaching the sand and then shinespark up. Samus cannot shinespark after unmorphing until she touches the sand and this can be used to shoot upwards without sparking. A diagonal ShineSpark will most likely not have any horizontal movement when performed from the sand.

Entrance condition:

{
  "comeInShinecharged": {
    "framesRequired": 150
  },
  "comesThroughToilet": "any"
}

Requires:

"h_canNavigateUnderwater"
"canPlayInSand"
"canShinechargeMovementTricky"
{
  "or": [
    "canResetFallSpeed",
    {
      "and": [
        "canPrepareForNextRoom",
        "h_canUsePowerBombs"
      ]
    }
  ]
}
{
  "shinespark": {
    "frames": 24,
    "excessFrames": 5
  }
}