This one is a really weird video that loses a lot in the compression that it endures at youtube. While I was waiting for the previous time lapse video to finish, I noticed some gnats buzzing around under the streetlights nearby. The light from above illuminated their bodies and gave the illusion of trails following tracing their flight path.

This is one video where you really notice the limitations of using a low end dslr for time lapse. The gap between exposures dictated by the limit on continuous shooting frame rate for the rebel XS means that a lot of the motion of the gnats was lost between exposures. This makes their paths look discontinuous. For something like cars driving down a street this isn't so bad because the path that the cars are taking is predictable and your brain will fill in the gaps. For these gnats, the path is random and the result looks like a bunch of squiggly lines.