When I was in college (82-86) our dorms included canister vacuums shaped like UFOs. The exhaust from the canister was aimed down and the canister hovered so you didn’t have to lug it around while you cleaned.
I’m shopping for a canister vacuum now and can’t find these anywhere. Does anyone remember these, who made them, or why the design didn’t catch on?
Seriously, it hovered just high enough to get clearance so it could slide around while you tugged on the hose. We even played a kind of air hockey with it.