Quicksilver Science!

[sleepy hedgehog]

I image it working like how you would interact with a paper airplane drifting by you.
You could swing it and release it with force but in a different direction.
Or grab it, move it to a new position, let the momentum bleed off and let it fall straight down

As for the bullets:
It's kind of in a similar vein to https://what-if.xkcd.com/1/
Air molecules vibrate back and forth at a few hundred miles per hour.
The bullet is being sped up to about 35000 milers per hour.
That should be fast enough for the bullet to disintegrate.