Kurmasana and options for modifications
One of the more challenging / uncomfortable / weird (what the heck is going on here and how could you possibly do this?!!? - my thoughts anyways!!) postures in the Ashtanga Primary Series.
If you try this please do it in the middle of your practice when you are super warm, it's quite deep - so modifications are given to adjust the pose depending on how you're feeling when you practice. I would not recommend trying this posture outside of Ashtanga really - as the Primary Series properly prepares your body to try this pose safely - and even then please be mindful of how you move into it and how you’re feeling - if you stop breathing and feel a sense of claustrophobia or panic you can always come out!! Definitely move away from pain, especially in the joints.

