Jackie is in the army!
We saw Jack talking to one of the guys and then saw the guy point down at Jack with a very puzzled look on his face and then put his arms up like "What is this kid talking about?"
We found out that Jack asked him if his arms and legs come off.
The arms and legs of the army guys that he had at home came off, so he wanted to know if the same thing happened to "real" army guys.