Ever pull the skin off your lip from the filter of a cigarette getting stuck to it? Why I try not to do anything requiring lots of focus without a cigarette stuck in my mouth. It hurts.<quoted text>
Let's hope you're not typing while drilling holes, or sawing, or something like that.
And if you are, keep the cigarette between you lips--don't grab it, the ashes will drop down due to the theory of gravity.
BTW, wind and blasts of air from machinery will overcome that gravity. You get ashes in your eyes or up your nose.