It's not super fast but you can see it still rocked them. That's how it is even with a slow speed car crash. It can still injure or shake you if you are not wearing a seatbelt. I mean, you can see how it shook them while wearing seatbelts, what more if you aren't wearing one and worse, it's high speed! Check out the second part of the video though. The person in the back got their face hidden under the hair because of the impact! Haha.