One of the requirements of the PADI IDC and the Instructor Examination is to demonstrate the PADI Rescue exercise number 7.
By the end of the course you should be able to demonstrate this skill in a relaxed manner. The aim it is not to do it fast, on the contrary you want to demonstrate it slowly and showing your students the steps and critical aspect of this exercise. Your students will then practice it. You want them to create and drill the muscular memory while doing the exercise so that, if one day, under stress, in a real situation, they will need it, they will be able to act correctly “automatically”. I hope this video will help you.