Wow, the things I’m unaware of living my sheltered life!
Yeah, I know. People take “wax” or “shatter” cannabis extracts (extracted with liquid butane at home under dubious safety conditions) and dissolve that in propylene glycol then load their vape devices. “Wax” extract looks like earwax and people smoke it, go figure.
I think you can buy wax and shatter and shard extracts legally in Colorado, but there have been a number of home butane explosions and fires to suggest a bootleg market.
Needless to say, one draw on such a loaded vaporizer is, from what I’ve heard, enough to launch you into orbit.