Sit down and position your head against the padding.
Tilt your head back as far as comfortable.
Slowly retreat to the start position and repeat.
Rushing repetitions.
Yanking head back.
Being uncontrolled on the way back.
Sit down and position your head against the padding, so that the bottom of the padding is at the top of your neck.
Start by tilting your head back in a slow and controlled manner, go as far as comfortable then retreat to the start position. Repeat for the desired repetitions.
Avoid rushing repetitions.