I paced a guy on an E-Scooter (standing, not sitting) the other day. He was on the sidewalk and going over 30 MPH. He was riding like a lunatic, switching from the street to the sidewalk and back. He was also ignoring traffic signals and the standard rules of the road. As no license is required, folks are using these if they have suspended licenses. Hopefully your son is wearing safety gear, especially a helmet.