Or extremely kinky

I liked the episode, but couldn't get over how badly the "Deep voice gas" was done. Any gas that you would inhale for that effect must be heavier than air, and thus would make the balloon become heavy, so it wouldn't go flying like that. Also, since it is denser than air it has a hard time leaving the lungs - meaning…

Maybe Wilson's cancer is just a hook for a spin-off, where Wilson and House start cooking meth.