I opened the curtains to let a little more light in for some shorter exposures.


With the flash. I wonder if there's a way to have it flash near the end of the exposure instead of the beginning. You might believe that the roller coaster was rolling the other way.


Again with flash. You can barely see some of the movement.


Shutter speed lengthened a little. This looks great (except, of course, the blur is in the wrong direction because of the flash).