"Ma, makes it stop! I don't yike it!"
I remember the first time he did this we were on a walk. I didn't know what to make of it. I thought he inhaled a bug or a weed or was possibly getting ready to hack up a lung.
Here's the youtube video link.
Usually I don't sit there and tape it. Usually when this happens I'm lying on the floor with him trying to calm and reassure him.