When you take an opioid and heat it with a lighter on tinfoil, you have a straw and inhale the fumes from burning the pill, then you take the liquid that was once the pill in the tinfoil and shoot it up.
Eric: aaahh, what the hell is that smell!!!
Mike: what?
Eric: Dude, did you just fart?
Mike: yeah, but i did it outside Eric: dammit man, you dragon tail that fart into the room.