Beth's Interesting Fact Explained

I have double jointed thumbs. My thumbs can bend back really far, sort of into an rounded L shape. Most of the people in my family have them too. So I never thought that it was an interesting fact until my friends at school thought it was so wierd. I haven't found it particularly useful but it's a pretty neat thing to be able to do. Maybe if I had it in my shoulders I could dothat thing where people can clasp their hands togethert and step clear through their arms. That would be way more entertaining than just my thumbs.