yeah, I like to see people try to completely clear my waterfall bong. its like, they keep pulling until they realize they're not going to clear it all in one hit. then they realize how big of a hit they just took. then it all comes pouring out off their faces. smoke it coming out with the coughing, spitting, sometimes vomit, and they eyes are so watery. It really is kind of funny to watch. but the two dudes who threw up, aren't real big smokers. and they said they were so high it scared them. so had to be nice to those dudes. but I think it scared them off.. they don't come over anymore.