A cigarette is standing vertically on its butt. You cannot touch it with any object(solids, liquids or gases). That goes for the foundation also. How can you make it drop? Asking another person to do it does not count.
(In reply to re(2): Possible?
Sorry about the plasma statement then, didn't mean to offend anybody. I looked it up, and yes, it is apparent that a flame is NOT plasma. Thanks for bringing it to my attention.
Plasma is a fourth state of matter. Here is a quote from
Plasma consists of a collection of free-moving electrons and ions - atoms that have lost electrons. Energy is needed to strip electrons from atoms to make plasma. The energy can be of various origins: thermal, electrical, or light (ultraviolet light or intense visible light from a laser). With insufficient sustaining power, plasmas recombine into neutral gas.
Take this information as you like. If you are interrested in the topic, just google for plasma. And with that said, I resign from trying to comment on this problem and surrender to saying that the magnifying glass is the best option indeed, as it does not violate the rules of the problem (given of course there is enough sunlight... Also given that while trying to find a strong enough laser that is cheap enough, someone already swiped the ciggy)