My sister and I used to ride in the cabover campers when traveling when we were young. I remember one trip when the driver slammed on the brakes when someone pulled in front of him and then accelerated after the incident. I rolled forward, from the stop, and then flew backward, over my sister and landed on the floor at the back of the large camper. I landed on my face. I was about 5 years old and it broke my nose. I'm lucky it didn't kill me.
Riding up there was fun, but I would never, ever, let my child do it.