It kind of goes without saying that making a screwdriver float for an prolonged period of time is no small achievement, because those things are remarkably heavy. So when YouTuber NightHawkInLight decided to check out an old mechanics trick - how to make a screwdriver levitate in mid-air by means of a low-powered air compressor - even he was doubtful. But never undervalue the prospects when it comes to fluid dynamics, because as you can see in the video below, it absolutely works.
So what exactly is going on here? The principle behind the trick is recognized as Bernoulli's principle, and according this principle as the speed of a moving liquid or gas rises, the pressure within decreases. So at first, the screwdriver is pressed away from the source of the compressed air, but since the air stream is roaming faster than the air surrounding it, the pocket of low pressure it generates effects in a kind of vacuum that keeps it trapped in the air stream. Which clarifies that instead of flying off into the distance - or into one of NightHawk's defenseless eyes - the screwdriver stays put, in mid-air, for as long as the compressed air is being directed through the machine. Watch this awesome trivk in the video below: