The effects that range from type of strain to others can be pretty drastic. I know of kinds that cause hallucinations and I have smoked enough pot to black out in the middle of standing and talking.
People have to realize that they can only get so high and they also forget how much it sucks to be fried and or become sick.
Dont abuse things its wasteful and as far as throwing up and all that jazz I have a stomach problem and some times normal weed getts me sick smoky puke sucks