Safety instruction for throwing the ball 1. Include exercises for stretching the muscles and ligaments actively participating in the throw in the warm-up. 2. Do not counter-throw. 3. Perform exercises in a line open to outstretched arms. 4. Strictly establish the order of projectile throwing. 5. Collect shells at the command of the teacher. 6. Make sure before throwing. 7. inventory (balls, grenades).