I love getting stoned because it gives me awesome ideas. Check this one out: a "weed bomb". You create a device which using some kind of extreme direct heat (but contained, possibly in a metal sphere like a grenade, but with vent holes) which combusts like a quarter ounce of hash concentrate in under a minute.
It'd be a party trick/prank or something. You'd set the timer, roll it into the room on the floor like a skee ball, and shut the door. The thing would blink lights and beepboop maybe and then just start spraying pure THC smoke into the air, perhaps rolling around on its own power like a firework or something, or a fucking Batman gadget! Yeah. It'd be an instant hotbox. You could do it in a car too, though it might be too much. Hey, different sizes maybe.