Hehe I've never thrown up before because of weed. Once after smoking though i ate 2 medium pizzas from Pizza Hut and i was wishing i could throw up but i couldn't. I've seen some people have weird reactions to hits they can't handle, especially those who have never smoked before/never smoked chronic/don't smoke very often usually it just takes the form of being stoned out of their minds though. But i usually smoke with other seasoned veterans. For newbies i wouldnt recommend diving in too deep right away, but theres still really nothing to worry about.