Corrected entry: Helicopters work by creating a low pressure zone above the rotors, by forcing the air down. In other words, sucking air away from the top side. Since the helicarrier is basically a giant helicopter, it's lifted by rotors, it should be sucking air in from the top. But judging by the way Banner's jacket blows, it's blowing air out.
rswarrior
2nd Oct 2012
Correction: While it's true a helicopter rotor uses reduced pressure above the rotor to produce lift, a rotor in a hovering [which is what the carrier is doing as it begins converting from sea to air] or vortex ring state, will produce updraft at the tips of the rotors, which is what is causing Banner's jacket to blow the way it does.
rswarrior