I am a recovering synthetic cannabinoid user. Although I had experienced bad reactions to the substance I continued to abuse it. I have had a seizure and black outs from smoking it. One reaction occurred from smoking Mango Mr. Nice Guy. I think the production and distribution of these substances it seriously out of control. Manufacturers don't realize the harm they are causing to the thousands of consumers that abuse their product. When I first smoked the synthetic cannabis it was a Spice brand. I didn't find the affects to be bad at all, in fact I found them to be euphoric and relaxing, similar to marijuana, but a much shorter high. Keep in mind this was several years ago when JWH-18 was still legal. I refrained from smoking K2 often because I was still leery of the stuff. About a year later after JWH-18 was made an illegal substance, I tried a brand called "Diablo" I noticed how much more intense the effects were, one of my friends was actually freaking out and we had to help her walk. Then after another year passed I tried some Mango Mr. Nice Guy. After one hit of it I started feeling the effects, I started hallucinating and losing conciousness. About fifteen seconds later I blacked out, my friends told me I fell over without trying to catch myself and started convulsing. I told myself I would never smoke k2 again. Another 8 months pass or so, one of my friends talks me into smoking Syn Chill. Not bad, very mellow. I start smoking Devils Advocate brand k2 regularly, I slow down and don't really smoke it much anymore. Then one day I'm at my friends sisters house and she offers a bowl of k2, not knowing what kind it is I take a hit. After about five minutes I feel pretty high, I take one more hit and decide to leave and meet a friend at the local gas station. I feel very hot walking up the stairs, and my vision blurs. I manage to open the front door to leave and I black out. I end up falling right out the door and onto the concrete steps. I come to probably about 10 seconds later to her daughter asking me what happened, I ask if I'm bleeding and feel my face. Seems as if my face has caught my fall. I do believe the manufactuerers are to blame for this monstrosity, but because the drugs used in the earlier generations were outlawed, they started using different, more dangerous substances. I find k2 to be very dangerous these days, and I hope it can soon be controlled so nobody else gets hurt, especially experimental teens, it could ruin their future.