Yes concerned mummy, I can do that with my fingers(one on top of the other, both hands)
We do the 'V' and 'W' in Pilates commonly called 'Spocks' and 'Kirks'.
My knees bend backwards.
I can also cross all four fingers middle over index, ring over little, both hands.
My particular 'party trick' is to sit on the floor with legs outstreched and knees touching, then to turn the soles of my feet to touch each other without moving the knees (I have quite hypermobile ankles).
Can join the hands to each other behind my back - some normal people can do this (maybe they can only just touch fingertips).
Can't do the ankles behind the head and could never put my palms flat on the floor.
I alway used to sit in the 'W' position cos it was very comfy, but we should not do that apparently. (in the prof's book)
Can't think of any more for the minute
diagnosed Feb 2006 aged 56 after 10 years of increasing pain and reduced mobility.
Grandmother to Charlotte (July 2010) and Eliza (March 2013)