Re: Knocking over a Hookah.
My worst horizontal hookah experience was when two of my friends and I were smoking using a pumpkin hookah. One of my friends got too comfortable, leaning back and pulling the hookah over by the hose. It toppled over but luckily I was quick on the draw, got the tongs and saved the carpet from the coals.
Unfortunately once we set the hookah upright I took the first draw. I got a mouthful of base water that got into the hose. I promptly spat it out on the floor to my friends horror, they had no idea what was happening. I looked like the little girl in the sixth sense that was vomiting under the bed.
Needless to say that was a bad knocking over experience. The lesson - check the hose for water when the hookah goes horizontal.