What a great idea!
Okay, so a few months ago I snapped a photo in an elevator at The Foshay in downtown Minneapolis, MN. Just coming in from outside, and the bright sunlight, I had forgotten that my ISO was at 100, and my aperture was at f/4.5 (@8mm). Being so dark in the elevator, those settings resulted in a shutter speed of 10 seconds. So I started to take a picture, and quickly realized that the shutter was still open… not wanting to just wait and let the shot die, I just moved the camera around randomly and I got a crazy result; light streaks all over the place. It looked pretty cool!
Upon getting home, I loaded the RAW file into Lightroom 4 and went to town. Normally I use one of the many custom presets that I have created, but this time I just decided to see what I could do. I jacked the contrast up as high as it goes (something I do the vast majority of the time), and that was really all I needed to do… but it was missing something.
After contrast, tinted the entire image yellow using Split Toning, and that was fairly cool. I wanted a bit more zip though, so I used two graduated filters… one green from the left, and one red from the right…. which produced a nice rainbow effect. The end result is here: