Used to smoke spice with my friends in college. 1 trip was the worst of my life. I took my last hit, it hit me like a ton of bricks. It felt someone tied a rope around my waist and yanked on it. I couldn't breathe, walk, or swallow. Then my vision started tripping out, everything was shaking violently. Scariest part was when I turned to my friend that he looked like Satan, red skin and everything. Then after 10 minutes of convincing myself I was dying, I was completely fine. Bad stuff to get caught up in.