Yep, nothing like sucking in dry ice. Dry ice would not do anything unless there was water in the bowl, and then the stem obviously have to be closed. Even with that it would look quite ridiculous what with all of that 'smoke' endlessly pluming out of the bowl. It would look as though the freaking pipe was on fire! Like I said before... hire a real actor who knows how to do his craft and take direction or find someone else.