i can whistle with my hands, put my feet behind my head, when i do a side split i cal put the upper half of my body all the way backwards and hold my feet with my hands, my knee shoulder wrist and hip pop out, i can speak gibberish, i can bend in half so the upper part of my body is by my legs and put my head and arms between & behind my legs (sounds a little confusing... probably like what StitchFansJr is talking about) i can do a hyper extended toe touch ( that when your legs form a V in stead of a -- which is straight across) and i can also bend my thumb back to my wrist (AmoDolphin) and probably more that im not thinking of or haven't tried lol