jammns

Why does the bus driver jerk the bus?
Do I need to become one to know?
Shall I obtain a doctorate in Psychology to fathom the depths of the mind which controls the foot which applies the brake which shakes my commuting body to and fro?
Does the driver not feel in his own body the stop and go swaying of the mammoth machine and does the driver not understand the same energy flux is imparted in an amplified form onto the passengers in the driver’s care?
Why does the driver jerk the bus?