I do admitt it's very very exagerated. I believe that the 'With stronger strains of cannabis' comment is in reference to skunk, and if so it's true to a certain extent.

Anyway, I just thought I would share it with you guys and most of your replies have put my mind at easy... still it's pretty funny, I think the main actor (shop owner.. old guy, weird smile) is very very scary, if I met him in real life I would quit cold turkey never mind get a new brain