Maybe you can help me? I smoked some weed today, and I know for a fact it was not laced, because I had smoked from the batch before and nothing had happened. Today I decided to get high. I took 2 pretty big hits, and zoned out. I was fine for about ten minutes, then all of a sudden my chest locks up and I can't breathe. I'm convinced I'm dying, and I have to concentrate on breathing for half an hour because I couldn't breathe unless I manually did it. I was convinced I was dying, and I freaked out. This has never happened before, but that 45 minutes was the scariest of my life.