This article refers to the lesson that can be heard here:
https://www.feldenkrais.co.uk/audio/four-points-extreme-feldenkrais-for-tennis/

The lesson I am sharing here is not an easy lesson. I would call it an extreme lesson. It doesn’t mean that it’s not possible for a beginner to do it. But it does mean that it’s for the more adventurous. I love teaching challenging lessons, and not only to athletes but to all kinds of people. Feldenkrais is not only about slow and gentle movements. An important part of the method is about how we deal with challenges, and so I have never been one to shy away from these types of lessons.
To warm up before playing tennis, or competing in some sport you don’t want to be too calm! Too much slow Feldenkrais can make you sleepy – tennis players need to be alert and awake physically, and mentally before they play. They need some fast movements, or even to sweat before they go on court. This lesson has the perfect blend of preparing the body to play, as well as waking up the sense of balance, and freedom of movement. If you prepare in this way — it will reduce the amount of time you need to spend on court warming up, the body will be primed and ready to go.

The real challenge with this lesson is not the movements or the position, but the way you approach it, and the way you deal with yourself through it. YOU are the one that matters here — not keeping up the instructions. Do less than you can the first time and see that it will still have an effect. Feel uncomfortable? Then listen to that and stop or take a rest. You are in control here and you make the choices. Once you realise that there is nothing to achieve or no one else to please, it gives a great freedom and possibility for learning. And you might just find that you can do more than you think.