As you are coming to a stop, you need to move your weight to the foot that will remain clipped in. Then you can unclip the other foot that you will put onto the ground. Thus, when you come to a stop you can quickly but gently put your foot onto the ground, but you just need to remember to clip out well in advance. When trying for the first time, or when you need to stop urgently, you may fall. They take a bit of practice.