During a tornado in the document author's hometown of Arlington, TX, their power went out and they needed a flashlight to see to get to a safe place. A flashlight can help people see in the dark for various occupations as well, such as a police officer using one attached to their service weapon in a dark shooting situation. The document discusses tips for using a tactical flashlight, such as using quick bursts of light instead of leaving it on continuously, moving between bursts, and not backlighting teammates to avoid being identified. It also notes that illuminating a whole room by aiming the light at the ceiling can help determine threats or hostages.