Look if you put a QZ in a joint one person cannot smoke it in 15 minutes. You wouldn't have time to breathe in between draws and you'd choke and pass out. Haven't you ever smoked a blunt with a few people? 15 minutes for a QZ joint my ass. Anyone who has smoked a joint that big knows you're lying through your teeth. That or you got really stoned and got confused about the time. I don't care if you smoke an ounce a day, you did not smoke a 1/4 in 15 minutes. Not even in a bong.