The Cowboy Hat can randomly appear on all players temporarily during a level when it says Super Flying Cowboy Mode . You can get a cowboy hat forever by using Folding@home [1] and getting 100 000 points. A Cowboy Hat gives you the power of being able to fly around the course. The jump button becomes fly up and the down button becomes fly down.

List of Hats(Portal)
Kong Hat-EXP Cap-Propeller Hat-Santa Cap-Crown Hat-Cowboy Hat-Party Hat-Top Hat-Jump Start Hat-Moon Hat-Thief Hat-Jigg Hat-Artifact