Weed is a mild hallucinogen. If you smoke a really strong afghani kush as compared to a strong South American indica, you could feel different. Sativa actually mellows me out. Even with a type you're used to, if you have the wrong thoughts, you'll go down a rabbit hole of no return until it wears out. Weed is harmless, except the baggage you have. Cannabis contains hundreds of chemicals besides THC, CBD and CBN. Those chemicals can be slightly different. The trace chemicals and main ones can react differently in different amounts or ratios. Weed can have very strange tastes based on genetics. It doesn't sound like it was laced, but several factors working together, including your state of mind before and while high. Just don't smoke whatever he had again to be safe. But if it ever happens again, keep telling yourself you're high over and over, along with, "I need to fucking chill out!"
