It's not as if you're a stranger to impulse or spontaneity. In fact, you wrote the book on it. So now, when a particularly odd idea occurs to you: one you're absolutely sure will be great fun for all parties concerned: not only will you not hesitate to mention it, you'll also go out of your way to sell it with an irresistible, unfailing frenzy. Better pass out disclaimers to be signed before you leave the building, though.