Metaphysics is fine, but as a real Physicist I can offer you a theoretical answer that even NASA considers viable, be it beyond our technological abilities. It is called Alcubierre Warp Drive, see short description at NASA site
Simplified, if we can somehow create matter with certain unusual properties we can make a space-time bubble around our spaceship, which gives two benefits. First, we could exceed speed of light as seen from outside, because our physical matter ship would experience only an immovable inside of such bubble while bubble itself could propagate as space itself with no limits. Second, as we'd be in that immovable inside, no acceleration of the bubble itself would be felt by us. We could accelerate very fast to faster than light speed, travel ... and, voila, turn, stop, restart... at any bubble speed and acceleration while not feeling any effects inside.
So, you see, aliens in UFOs who would have such faster than light tech to reach us here, could by the same token zip, zig and zag at will ...