well that explains why at least plugging buproprion gives a solid rush when plugged. it is, however, a nearly worthless endeavor that results in a lousy high that is absolutely not at all worth it. i'd say those cheap benzdrex heart-attack inducing inhalers with the menthol oil cotton thing are a better high.
also plugging ritalin is IMHO THE WAY to go if you're chasing a rush from it. Just be sure you don't suck up any of the pill filler into the syringe otherwise you'll shit it all out very violently less than 15 min later. the crash on it sucks tho.
smoking stuff off of foil is called vaporizing, not 'freebasing.' that is a retarded sounding misnomer used by people who want to sound cool by comparing their silly jr. high school antics with that of honest to goodness, god's chosen, hardened crack smokers, who smoke 'freebased' cocaine (which, incidentally, they do so out of a pipe and not off of foil). sorry to rant but its for your own good