warp drives are dangerous
"NASA researchers recently revisited the Alcubierre warp drive and concluded that its power requirements were not as impossible as once thought. However, a new analysis from the University of Sydney claims that using a warp drive of this design comes with a drawback. Specifically, it could cause cataclysmic explosions at your destination.
To see how the Alcubierre drive could devastate an entire star system, you have to know a little about how it would work. The ship would consist of a central pod, and a large flattened ring around it (pictured below). The ring would have to be made of an as-yet unidentified kind of dense exotic matter capable of bending space-time."
http://www.extremetech.com/extreme/140635-the-downside-of-warp-drives-annihilating-whole-star-systems-when-you-arriveforget the star wars effects when the millenium falcon speeds up
"When we watch movies or play video games that feature space travel, someone inevitably ratchets up their ship’s speed to warp drive and begins traveling through hyperspace. In most forms of visual media, hyperspace travel is depicted pretty similarly — the stars begin as little pinpoints of stationary light peppered throughout the black backdrop of the universe, then quickly move to form long, straight lines of light, streaking by the ship’s windshield. Physics students at the University of Leicester have performed some research, and determined that if achieved in real life, hyperspace travel would look nothing like the movies."
http://www.extremetech.com/extreme/145872-hyperspace-travel-would-look-very-different-than-it-does-in-the-movies