I came off my Ninebot at about 15kph and sustained moderate injuries. I was lucky to keep my left pinky. Stand-up, zippy scooters are DANGEROUS!
Glad you're ok! Were you using the original Max G30P?
Don't know exactly what model, and I can no longer answer your question since I sold it on, fast.
I only had it a month and had a minor accident and a moderate accident. I'm not waiting for a serious accident.