Fake, 40mph head slam is a trip to the hospital minimum; you can slam someone into the dash just by letting the car roll from idle and then hitting the brakes (if it’s a v6 or thereabouts in typical displacement). I know 'cause I tried it once not realizing how badly I would make them hit the dash. I just thought I would make them jerk forward a little and scare them. Seat material matters, of course, in my case it was fake leather/vinyl.
Fake, 40mph head slam is a trip to the hospital minimum; you can slam someone into the dash just by letting the car roll from idle and then hitting the brakes (if it’s a v6 or thereabouts in typical displacement). I know 'cause I tried it once not realizing how badly I would make them hit the dash. I just thought I would make them jerk forward a little and scare them. Seat material matters, of course, in my case it was fake leather/vinyl.