If nobody went into a coma, chances are it wasn't any severe pesticides or Windex (which is used by some assholes to stop mold from growing on their plants....). When you say a guy passed out, how long was he out? And how was he when he woke up?
You said things were "moving in frames"... I've heard that's an effect of mescaline, but I've never heard of anyone getting an effect from smoking mescaline. It could have just been contaminated with some kind of mold, which is not unusual, although it is quite possible it was a mild pesticide. Just be careful about where you get your weed. Its almost impossible to tell if its been contaminated, so you have to check your source. I try to only buy from people who personally know the grower, but I know that's not always possible.