Re: those jet backbacks?
John, you said
"Even the very best rocket engines can't give the buck-rogers performance desired from a rocket pack. You could accelerate to speeds far faster than you would care to, but you couldn't hover for even two minutes with propellant you could carry on your back. Rockets are for accelerating, not cruising."
So obviously the solution for hovering is either an anti-gravity belt for sustained lift, or shoes lined with Cavorite...
And if you deny these exist, outside of Black Helicopters, I'll deem this proof of your complicity in the conspiracy to hide them....
:-)