KS-18S Power Cut Off Suddenly When Riding in a Seated Position - Bad Injury to Left Arm

[Roll_On]

I am a rider of EUC since May 2017 and never with any injury.  At first I was using Inmotion V8 (no seat), and now for the last 8 months I am riding KS-18S (with a seat).  I have only been riding the KS-18S in standing position so that auto driver could see me better with the flashing red light on the helmet.  Just recently, on a commute ride (3.5 miles one way), I decided to ride seated since I am less than half mile from home.  The power just happen to cut out (with no prior warning of any electronic issue and battery at 90%), and I just crashed into the pavement so fast I was immediately in massive pain.  My left arm just happen to be closer to the pavement, and took all the  damage. The ulna bone dislocated, and the radius bone fractured (such severe pain).  Helmet protected my head and face, and no injury to the leg or the body as I fell forward with no auto balance.

The specialist doctor knew something about the EUC (kind of surprise), and he explained that there was no other part of the body to distribute the impact force, and that is why the left arm took all the impact force.  Since the arm bone is much smaller than the leg bone, fracture is the expected result.  If I were riding in standing position, and falling, the leg and the body with more body mass would absorb the impact much more.

Since there is no way to know when power will ever cut out, I will not be riding in seated position even on normal slow cruising speed.  The injury pain and suffering, medical costs, and being handicap for 2 months is just not worth it.  The KS-18S seat could still be useful when you like to rest your leg at a stop light, or at a coffee shop.