Strewth I'd thought we'd done with this one. The lift might create an area of low pressure above it but certainly not a vacuum. I agree.
Helicopter rotors are wings and work in the same ay by creating a difference in pressure over their surface. Check. However, rotary wing aircraft, at low altitude produce something called ground effect where they essentially ride on a cushion of air that is created by their own downdraught but this is at only low altitude. Helicopters have a limit on what they can lift and that includes their own weight as part of the payload. If the helo is dropping due to gravity and weighs say 5 tonnes, then before it could even hover, it has to be able to overcome the inertia of falling first and that would be huge given gravity's effect.
The answer to whether it COULD is yes, but the answer to whether it WOULD, depends on how much the blades are able to lift. Ie it's a maths calculation for that particular helicopter.
I think Nick has it. Airwolf definitely could but not in stealth mode.