my friend was recently smoking, well a piece of the "tobacco" went down the wrong pipe (trachea) he felt it there yesterday, and overnight it must have traveled into the lungs..today he has coughing like bronchitis. He does not have insurance, and is hoping it goes away on its own..I'm worried for him, as I do believe this is dangerous. I know some small food particles can be okay, but when it comes to this I really do not know. Any help would be greatly appreciated. Thank you.