Alien Invasion or Tornado? Can’t Really Tell

[Disclaimer: You’re truly missing out if not watching in full screen HD. Sound also helps. So do it!]

What is THAT? If I saw whatever this is/was coming at me I would be staring directly at it with my jaw on the ground (as I am now). Shot in Booker, Texas by a storm chaser, this supercell time-lapse is ominously beautiful.