Start standing in an athletic position with a barbell across your chest. Your grip should be slightly wider than shoulder width with palms facing away from your body. Quickly squat down to a quarter squat position by pushing your hips back, flexing your knees and keeping your feet flat on the floor. Drive up extending at the ankles, knees and hips; drive the bar over your head. Catch the bar overhead with a slight bend in the knees.