Or if you catch the throttle when at rest as I have done. BUT having done it you are then very careful about switching the power to off when stopped.
To avoid accidental use of the throttle, I turn the electric assist on/off as needed during journey. This following one incident of me being dragged into a hedge while 'stationary' and another of me having a tumble while on the move. It's a bit of a faff but worth it!
Karen