I've smoked a few times and have only done weed once, which was actually last week.
It was shit. My mate tried as hard as he could to try get me high, it did fuck all and the only things that happened to me was I became light headed and slightly dizzy.
Never doing it again since I'd rather not fuck my brain cells up more than what they are already.
Wasn't going to do it in the first place, but I'm a person that crumbles under pressure quite easily.