Smoking meth actually refers to vaporizing it to produce fumes, rather than burning and inhaling the resulting smoke, as with tobacco. Meth can be smoked in glass pipes, or in aluminum foil heated by a flame underneath.
When a person smokes meth, they can become paranoid and hear and see things that aren't there. Immediately after smoking, the meth user experiences an intense sensation, called a rush or flash, that lasts only a few minutes and is described as extremely pleasurable.
Chunks of clear, high-purity meth ("ice ,crystal, glass"), which resemble rock candy, are smoked in a small pipe, much as "crack" cocaine is smoked. Some users exploit the rapid vaporization of methamphetamine, spreading the powdered drug on aluminum foil, heating the foil, and inhaling the fumes that are released.