Anyone here double jointed?

I talked about a fall I had Saturday in my Snow thread, and described how I fell in a T or W possition. Now I don't think what I can do is necessarily double jointed.......but I can rotate both of my legs in at the hip and bend my knees where they are lying on their sides and touch my toes together facing each other.
My son can sit in a W pattern, but not touch his toes. My father used to be able to sit this way. When my children were small, I was told to discourage it. But to this day I can still do that. But falling into that possition hurts!
Any of you have any strange things you can do like this?

My son can sit in a W pattern, but not touch his toes. My father used to be able to sit this way. When my children were small, I was told to discourage it. But to this day I can still do that. But falling into that possition hurts!

Any of you have any strange things you can do like this?