You can overdose from marijuana, and this guy had the right idea, butter. Overdosing from smoking is impossible yes, but I know of people who have had to go to the hospital because they ate one too many goodies. I have to agree with everyone else on here though, pointless to do it, its not fun. I say just roll a big ol' joint with the weed you're thinking of using for your butter and smoke it with some buddies.