In this video we take a look at why JWST had such an odd motion during the time lapse I recorded this past weekend and we revisit our old friend, parallax. That's right, the same principle that caused ISON to look like an angled "UFO" in a stacked image from Hubble also caused JWST to look like a mirrored S shape in my time lapse over the weekend. Only instead of being caused by Hubble's orbit around the earth, this time it was caused by earth's rotation. After calculating the orbit, I ran a simulation looking back at earth from the perspective of JWST and sure enough, a flipped image of the curve lines up perfectly with the apparent motion of Florida relative to the background stars over the same time period.