Poltergeist 
To dream of a poltergeist, whether seen or heard, indicates that one is experiencing a lack of control over their life. It may be that some aspects of your life are interfering with your goals.
Bulletproof Vest
Wearing a bulletproof vest in a dream is a sign of being vulnerable in your waking life. You feel like people are 'taking shots at you' and you are taking action accordingly in your dream. Though the threat of bullets may be figurative, you are being emotionally wounded by others in your waking life and your subconscious is trying to tell you to take protective action.