The bar lands on your shoulders. You don't catch it in your hands and gently place it on the shoulders. You jump (HARD) with straight elbows, then you get under the bar and let it slam into the meat of your deltoids. My advice is to pick a lighter weight and work from the hang position. Once you can catch the bar in a solid rack, with the elbows pointing straight ahead (not down), you can start pulling from the floor.