That was a bone in his foot. I don't want to discredit his abilities or anything, because obviously he is a hell of a player. However, the whole growth hormone treatment thing seems fishy to me. He had a deficiency, yes...but when did he finish growing? I'm sure the Barça doctors know, but we don't. If you keep giving growth hormone to a person after they're already done growing, it helps one burn fat easier and strengthens one's connective tissue (ie. ligaments).