You most likely did a push-up at some stage in your life before beginning CrossFit, but you may not have done the full spectrum of motion pushups we use in CrossFit. Your arms should be absolutely straight at the top, and your chest should be in touch with the ground at the bottom.
800 meter Run (together) 50 Pull-Ups 100 Push-Ups 150 Air Squats 800 meter Run (together) 30 Pull-Ups 60 Push-Ups 90 Air Squats 800 meter Run (together) 20 Pull-Ups 40 Push-Ups 60 Air Squats 800 meter Run (together)