I watched a video on relaxation, and the person giving the lesson said that people under anaesthetic are very flexible.
She said you can put the legs of even an older person with stiff joints right over their head and that people are so flexible when anaesthetised that doctors and nurses have to be careful when moving them.
I wanted to hear from anyone with substantial direct experience of the truth or otherwise of this statement. So I asked on Metafilter and got a lot of replies. One was from a doctor in Mineola, NY, and she said:
From my ample experience positioning patients for surgery this year: while everyone is more flexible under anesthesia, not everyone is extremely flexible. Some extremely stiff old folks become merely moderately stiff instead.
In The Apple Tree 