Yes, the guy I smoked with was a friend's brother. I'm sure he wouldn't knowingly smoke or give me laced weed, but perhaps it was sold to him being claimed as "good" weed, but it was really some chemically laced junk. He's a long time pot user, so I would think he'd know better, but in this hypochondiacal state, I always think the worst, no matter how ridiculous the scenario seems. He assures me that it was just weed. The resin of something he had been smoking a lot of, something he called chronic (whatever that is). He said that if it was something else, he would have noticed. I do know that resin itself is very strong, but that's about it.
We smoked the exact same stuff and the exact same amount, and after smoking, he was fine. He was the same as how he always is when he's stoned. It was only I that had a strange reaction, but then I think, "what if I just happened to have a stronger concentration of the chemical?"