I was padded up for both falls but still sustained a sprain to an ankle and some pretty mean scrapes to my shoulder and arm.
My worst fall was due to the motor cutting out on a moderate acceleration uphill climb from stop. This is not unusual on the OW but is normally associated with a lower battery level.
I was pretty good with it, but in the end I could justify the potential for falls once every 100 miles, let alone 50.
They are fun to ride, though.