I've had plenty of experience with shadow people, usually following a long stimulant binge. it got so bad I started trying to attack them with rocks, throwing knives, whatever was around. Even set up traps so I could hear them coming or harm them in some way. One time a few years back a man was shot four times in the stomach in the parking lot of the condos I stay in and I went up to the guy who shot him yelling at him about shooting guns off in my neighborhood. The next night I could swear him and some friends were standing around on my back porch trying to intimidate me from talking to the police. I was trying to entertain them by playing my harmonica. Speed will do that kinda of shit to you lol