As we all know by now Y/N is a Yoga master so he or she or even they can do all sorts of yoga poses.
Specifically you were doing this
The thing that worried sarv is that with any wrong move in yoga a bone or joint will never be the same.
So when you got into a risky pose she would force you to get out of that pose.
Just know that she is always watching you when doing things like this
In the end you know she is just looking out for you