The hammer is a fun throw that is not completely necessary but can be used pretty effectively in competitive games of ultimate. This is another throw to impress your friends with when you are just throwing around.
To throw a hammer, put your fingers in the power position used for a forehand. Then, position the frisbee upside down and at a 45 degree angle above your head. Pull your arm back and throw. During its flight, the frisbee should gradually level out. By the time it reaches your target’s hands, it should be completely level and upside down.