QueenBeeBeeMari,
By "shoot out", I'm not sure if you meant "extend quickly" or "launch". But, if you meant launch, WOW, forget RPGs, imagine Laser Guided Tickle Missiles. I never thought of that. I can't help but imagine the battlefield with giggling causalities strewn about, medics desperately applying topical anesthetics, and a general, with binoculars, grimly saying "War is Hell". Shades of Monty Python's killer joke.
If it is just like an arm extender, I wouldn't pay as much. I could almost as easily walk over to the victim. However, it would keep yourself safely out of reach, so it is still a good invention. But if it shot out some kind of tickle robot hand missile that could grab on and tickle when it landed, that would be a great invention.
I'd pay a few hundred, if I could figure out where to get a lot of safe use out of it. We need a tickle version of a paint ball field.
Lee