How can a skater effectively call off a jam?

To effectively call off a jam, a skater should place their hands on their hips. This gesture is a universally recognized signal in roller derby that alerts the officials, teammates, and opposing teams that the skater intends to end the jam. The hands-on-hips position is clear and visible from a distance, ensuring that the communication is instantaneous and understood by everyone involved.

Other methods, such as making a loud noise, may not be effective due to the noise level in a roller derby environment with loud crowds and possibly music playing. Raising arms can serve as a signal but is generally not the standard for calling off a jam; it can be confused with other gestures. Signaling with feet is not a recognized method for communicating the end of a jam and might not be noticed by others as easily. Thus, placing hands on the hips is the most effective and recognized way to convey this crucial message during the game.