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I know there are some videos like this on YouTube already, but what the heck. And just to point out before I get a bunch of grandmas bitching at me, no drug is 100% safe. Every drug has its ups and downs, but marijuana is by far the least harmful drug you could buy on the street (or even in shops/stores if it were legal). Of course there are/can be downsides to smoking pot, and if they bother you then simply do not do it and let other people get on with their lives.