Floppy Arm

Woke up this morning and when I tried to lift up my right hand, to my horror it just flopped over! My right forearm was momentarily paralysed, I could not feel the nerves at all! I must have been sleeping on my right arm the whole night, and it wasn't funny when I could not lift it up at all. Now I know how Harry Potter felt when he had the bone removed from his arm!