Anticipate situations that you may encounter and what actions you might anticipate from a violent mind. The “what if” challenge will prepare you and your team.
Think in advance how you would get out. Know where all the exits are and where you will go once you get out.
Find a place to hide away from doors and windows. Lock or barricade the door.
As a last resort, and only if your life is in danger. You have to commit to this action and don't give up.