It also pisses me off about people labeling strong experiences as "the weed had to have been laced". Obviously those people haven't smoked some good shit. About 3 months ago, I was a novice smoker. I had started out with commercial, quickly switched to midgrade, and the first time I smoked a SHIT load (like at least 20 bong hits of good middies) I was FUCKED. In my mind, I was reliving being a child. For instance, I saw images in my mind that I remembered seeing as a child, and must have forgot them long ago. I thought that my life was flashing before my eyes, but really it was just my mind remembering shit. I thought I was dying. Instead, I just passed out, woke up in the morning fine, and smoked more. My first time smoking, I smoked alot, and freaked out. As others have said, weed can be really strong. It all depends on what you're used to. If you're used to indica, and then get sativa, or if you're used to smoking mids or commercial, and then get some fire shit, or even if you're used to smoking a certain amount but smoke more and more, you will think all sorts of shit like "Could it be laced?" "Am I dying?" IT ALL DEPENDS ON WHAT YOU'RE USED TO. After smoking my first time, I swore I'd never smoke again, because it freaked me out. I was anti-pot for two years, until finally trying it a few more times, enjoying it, and continuing almost daily. I now look back on my first time, and would love to have those effects now, knowing that I'd be fine in a few hours. Whatever type of scary feeling you get, just know that it's the drug thats making you feel that way, it WILL go away (my first time, i was afraid that the effects would never go away), and that NO ONE HAS DIED FROM CANNABIS.
Just chill out, and be open minded. And for those quick to say "It must have been laced", just save up your money and buy some good shit.