So it allegedly was sucking in air through those nozzles and then instantly changed from sucking in air to blowing out air ?

On a shop vac you turn it off and then connect the hose to the other end of the machine, turn it back on. The motor has to rev up again.

They put a dramatic sound track plus cheers, but you cannot hear the actual thing you’re seeing, except for a vacuum sound.

So it is misleading to say it was « live » it was prerecorded and then played on two screens on each side of the stage.