In all seriousness, A 114ci tank @ 4500psi could fly half a mile or more in the air.
I used to play paintball...but this car size and you need to watch the video. Would you shoot a regular car tank, either?
People used to say the same complaint for modern day cars, but for the most part that's not the biggest concern.
I'd say the biggest concern is: does it work? That's why I say...if it's commercially viable, then it's worth paying attention to. At this point, it's mostly an idea adopted by a big Indian company. But then again, many corporate companies advertise bad ideas e.g Corn ethanol idea by GM.