Through the Jet Stream (Dire, Dire Docks)

Through the Jet Stream is the fourth mission of Dire, Dire Docks in Super Mario 64 and Super Mario 64 DS. The mission requires the use of the Metal Cap in the original game or Wario's Power Flower ability in the DS version. It is the only mission in the games to share its name with another mission in the same game.

Layout
The player needs to first enter the second area of the course by going through the tunnel. On the floor is a steel grate with bubble rings flowing out of it. The player needs to swim through five of these rings before they disappear. Otherwise, missing one starts the counter over. Once five consecutive rings are swum through, the Power Star appears above the grate. The player must then swim to the surface, collect the Metal Cap (or Power Flower as Wario in the DS version), and sink down to the waterbed in order to collect the Power Star, as the propulsion of the water prevents the player from obtaining it normally.