Hat manipulation--a form of juggling

Hat manipulation is a form of juggling in which the manipulator performs feats of skill and dexterity using a brimmed hat such as a bowler hat or a top hat. Tricks can range from rolling a hat up and down the various parts of the body to throwing and catching the hat in amusing ways. Hat manipulation is often comedic in nature, and can be very entertaining. Part of the appeal of the art is in the necessary equipment; all that is needed is a good, heavy, brimmed hat which can be found at many juggling stores. Famous manufacturers of manipulation specific hats are Nils Poll and Dubé. Hat manipulation is also frequently combined with traditional forms of juggling in order to create more varied acts.
There are 7 major categories of tricks performed during hat manipulation, which are
Tumbles
Tricks where the hat rotates end over end.
Twiddles
Tricks in which a hat rotates quickly through the fingers.
Spins
Tricks where the hat spins around its central axis, much like showing off with a basketball.
Rolls
Tricks involving the hat spinning on its brim like a wheel.
Throws
Tricks where a hat is thrown into the air.
Comedy
Gags with the hat intended to make the audience laugh.
Multi-hat juggling
Juggling 3 or more hats along the lines of normal juggling.