This particular sequence is overall fantastic for intermediate contortion students. It progresses to more advanced movement, however these progressions are [obviously] optional.
Dsclaimer: Content is designed for demonstrational purposes. Those who choose to participate in contortion flexibility training do so at their own risk. Please consult your trusted medical professional for clearance to participate in any physical training program. If you have questions about safety and individual guidance, email firstname.lastname@example.org for consultations and rates.