But If It Does Happen: "If someone's coming in through your window or fire escape, run out the front door—and vice versa. If you can't get out, lock yourself in the bedroom, barricading the door if necessary, and call 911 from your cell phone, which you should keep by the bed at night. If he reaches you anyway, remember counterattack rule number one: Get 'em in the eyes. As McCann notes, if someone can't see you, he can't hurt you. Aim pepper spray, air freshener, or hairspray right where it counts.