Air has the most common flow, found in tunnels and certain parts of levels where the game has to move the structure or Goo the player is using. Airflows cannot be seen, but when a Goo is traveling in one, it is noticeable. Take, for example, the Beauty Goo from Beauty and the Electric Tentacle. When it takes the secret passage by going backwards off the line, it travels on an airflow through the air, and then into a tunnel. While flying, the Goo's shape warps slightly.