Position yourself in the push up position on your fists and have a friend use a shovel or any other hard tool push and pull on your body from all sides as you move the least possible to keep your form and relaxation. Later have him place his foot on you and try to stand on your body. Feel where his body is going and let it go there as you escort it with yours. Follow the same drill on your fists and your body aligned with your chest facing upwards and maintain your shoulders and hips relaxed as you work