Always thought my accelerator pedal was a bit jumpy when moving off from a starting position ie roundabout.
Looking at the linkage its pretty obvious that the cable is fighting to raise the lever and struggling because the rotation is initially acting in a horizontal movement as apposed to a rotating movement, what i have done is reworked the lever to an almost vertical position to see if this will smooth out the pedal movement, the cable may well need to be adjusted accordingly.