The way to think of an emergency stop or controlled stop
Is to think of stopping the same way that you've probably had to do already.
Whether its been when you're approaching traffic lights and they start to change so you have to stop quickly
Or you may hav eapproached a roundabout and a car comes around really fast, so you again have to stop quickly.
These are the same principle with the emergency stop.
You want to stop quickly, without skidding to a stop.