Too much speed is ussually the problem but other things happen. People panic and over steer or maybe the crasiest idea is the waving. You need to forget about saying hello and pay attention to what you are doing. I ran off the road after waving to another rider. It could have been a problem but I was lucky.
It is really nothing to worry about if you keep it slow. I notice that I could ride at or below 30 MPH, wave, enjoy the scenery and enjoy the ride.
Don't miss "Cade's Cove".............. God lives there