This guy uploads a lot of nice shisha experiments.
Here¬† he has added ONLY very large ice cubes to the glass bowl… and gets great¬† freezing smoke, but no hubbly-bubbly noise.
http://www.youtube.com/watch?v=FYgSW_ixrAI
DO NOT do this. The fool has put dry ice in his  mouth and blows out smoke.
worse some people I¬† know have put dry ice in thir water shisha bowl. I’ve read that its dangerous.
http://www.youtube.com/watch?v=FdI5pJCCcSw
Now, this is safe! I’ve done it.Adding salt to crushed ice. I’ve also mixed salt or sometimes baking soda to the water and put in the freezer. The¬† salt will keep the salt from freezing 100% in the freezer, but the smoke is colder and the smoke is much thicker.
http://www.youtube.com/watch?v=oi1kIp2zG8k
Only a college student would do this!!
Ice and salt on his back! His friend spelled the letters “a S S ” on his back! Cold stuff and it burns.
http://www.youtube.com/watch?v=_XiPtEuXh6s
http://www.youtube.com/watch?v=msaXH1K1VcI
“Smoke gets in your eyes”