Eyewitnesses say ufos can move in impossible ways, having crazy acceleration, but they also say they can simply vanish into thin air and appear again at will and aren't affected by bullets. The westall ufo flew through trees according to witnesses.

By these reports these craft don't simply use new propulsion technologies, or "bend gravity" but they can manipulate spacetime on a lower level. They are probably using strange new states of matter/light/other things that they have discovered.

The best new theory of the universe that we have IMO is the model that what we see and interact with regularly is only the top layer and that the mechanisms underneath the hood are actually 99%+ of the real universe and is where weird things like quantum entanglement, superposition, but also position in space etc. come from.

When you take this into account you start to realize how impossible things may be possible after all.