I had some very strange habits growing up.
Looking back, I think it was a form of Tourettes which I've (mostly) grown out of, but it never really got diagnosed in the 70s-80s. I used to twitch quite a lot and I still do now, particularly when I'm stressed or tired. But when I was much younger, I had a lot of what my parents used to call my "Habits". It ranged from being twitchy, stuttering, making compulsive squeeking noises, blinking compulsively and nodding continuously - sometimes this used to make my nose bleed. Anyhoo, all pretty normal you're thinking (maybe), but the most bizarre thing I used to do was one which became known in our family as "The Poodle". I used to walk along and then every so often I'd put my hands into a doggie-style begging position and stand on one leg with the other lifted out behind me. Life eh? You couldn't make it up.
( Farmfoodsman, Sun 4 Jul 2010, 10:06, 2 replies)

Any photos?
Was it always the same leg? How long did you hold the pose for?
(Juan Quar is clinging to her front teeth on, Sun 4 Jul 2010, 12:23, closed)

You're in good company
Dr Johnson had Tourette's as described by Boswell, and he had quite a lot of your symptoms.
(all my scars face forward possesses 2.5% of a hyperalloy combat chassis, Sun 4 Jul 2010, 20:33, closed)