Ebikemotion. Something I discovered yesterday. On a flat or very light gradient (1%) if you start pedalling and then you reduce heavily the pedalling frequency, without making any effort, the motor keeps pushing, gaining speed up to the maximum that it can achieve. If you keep moving the pedals it goes ahead, if you stop moving your legs the motor stops. I think it is related to the fact that the system has no sensor on the pedal pressure. Obviously on steeper gradients the motor has not enough power to push the bike without human help.