To break the bomb blocks with speedbooster without falling down, stand under the lower ceiling at the right and hold run before pressing forward. If it doesn't work, back up a little and try again.

Requires:

{"or": [
  {"and": [
    "h_getBlueSpeedMaxRunway",
    "canCarefulJump"
  ]},
  "h_carefullyDestroyBombWalls",
  {"obstaclesCleared": ["A"]}
]}

Clears obstacles: A