And that's why, if you want to scratch your nose during that part of the session, do it - you may be reassuring your local dog walkers that, in the words of the old plague victim in Holy Grail, "I'm not dead yet!"
(Funny thing was, at the centre where I did yoga years ago, Shavasana was done lying with your legs extended up against the wall - that would have looked like the weirdest ritual mass murder scene ever. 😄)