Damn! I'm sorry to hear that. I'm glad he's OK. I really dislike those e-scooters.
All the time now people come up behind me while I'm walking on the sidewalk, blasting super fast, ringing the bell a bunch, and then yelling at me and almost hitting me for not getting out of their way. Every time I'm just like "Ride it in the street!" and I fully expect one of these dudes to hit me very soon.