During a concert of Gary V. and in order to prevent the crowd from rushing to the stage, Rafael Padilla {a security guard} pointed his gun at the onrush of people. When the crowd still pushed forward, Rafael fired his gun into air to scare them off. However, the bullet hit one of the metal roof supports, ricocheted and then hit one of the stage crew members, causing injuries which resulted in the latter's confinement in a hospital for twelve days. What crime/s did Rafael commit? Explain your answer.