What are the seats directly attached to on the Cobra roller coaster at the Tivoli Friheden amusement park? 
the wheel carriage
Title: Inverted roller coaster
Passage: An inverted roller coaster is a roller coaster in which the train runs under the track with the seats directly attached to the wheel carriage.  This latter attribute is what sets it apart from the older suspended coaster, which runs under the track, but "swings" via a pivoting bar attached to the wheel carriage.  The coaster type's inverted orientation distinguishes it from a traditional roller coaster, where the passengers' legs rather than arms are exposed.
Title: Tatsu
Passage: Tatsu is a steel flying roller coaster designed by Bolliger & Mabillard at the Six Flags Magic Mountain amusement park located in Valencia, California, United States.  Announced on November 17, 2005, the roller coaster opened to the public on May 13, 2006 as the park's seventeenth roller coaster.  Tatsu reaches a height of 170 ft and speeds up to 62 mph .  The ride's name means "Flying Beast" in Japanese.  The roller coaster is also the world's tallest and fastest flying coaster; is the only flying roller coaster to feature a zero-gravity roll; and has the world's highest pretzel loop.  It was the world's longest flying coaster until The Flying Dinosaur surpassed it.
Title: Cobra (Tivoli Friheden)
Passage: Cobra is a steel inverted roller coaster at the Tivoli Friheden amusement park in Denmark.
Cobra (Tivoli Friheden) Inverted roller coaster