Well, I can't use the stuff personally. Kicks me into anxiety spirals.

But, I know a shit ton of mj enthusiasts because I've always been friendly about it anyway.

The degree of reaction you're describing isn't common. But it does happen. Herb being a natural product, there's variance in exactly what balance of canabinoids are there, and there's always the non-zero risk of additives if you didn't grow it yourself.

Plenty of people will smoke a J specifically because it makes them sleep easy, but directly passing out is rarer to find. From what I've run across, that's usually a sign that there was something else in it. In the instances I've run across it happening otherwise, the person had something else in their system that did it in combination. MJ is typically going to spike heart rate and blood pressure, not drop it, so a sudden and severe drop would be a very unusual event.

So, I suspect that the festival joint was not just weed. People have been known to mix their stuff and not warn others. If that wasn't the case, then I'd suspect an interaction with a medication you're taking, but (being honest) I've never heard of anything that drops BP in combination with thc, or cbd in specific, nor even with whole flower.

It's kinda the main risk involved with the substance, and it's typically a stronger affect when smoked because of the smoke itself. It increases heart activity in a way that isn't beneficial, and may (not enough data out there for any conclusions to have been published that I've seen) have long term negative outcomes.

I would say that if you're having that showing strong a reaction, it may be time to test out reducing your dosage when you do partake