Jawku Speed Parachute The best way to improve your performance is to measure it. Knowing your personal record or the score you are trying to beat gives you an optimal guideline to follow for improvement. It’s as simple as knowing your starting line and finish line. This is why we recommend that all of the following drills be done using the Jawku Speed Timing System in addition to the Speed parachute to maximize your results. Includes a carry bag and drill cards for suggested training.