I want one. Much like a Bugatti Veyron, I have no idea when I would have the opportunity to really use it or where I would safely store it but I want one nevertheless.
I think it is to big to mount it on a Bugatti Veyron, but it would be nice (would the resulting Vortex Ring be faster by the speed of the car, or would the car drive into the ring, if it is fast enough?).