This is advice from my pops, and it's definitely true: Some people have "glass heads", they smoke and their whole world collapses, they freak out and go nuts. My mother apparently had one, she'd smoke and exactly what you described with that girl happened to her. I have that to a degree, my tolerance is ULTRA low and if I smoke a lot of really good bud and I'm in a bad spot (i.e. public) I flip out like she does. Over time I've gotten used to things more, but man, it's not fun.