I had we'd that sparked and flared up. It was too much fertilizer and not flushed and also spider mite bodies and eggs. Sometime infestation of spider mites makes the weed do strange things but too much fertilizer always burns the lips when smoking it and burns fast and hot. I would be surprised anyone would add something to weed. I mean c'mon now. It would make bad feedback and vendor rating. Who would chance it? Just for weed? I think it's something else .