Not really lens flare, but Chip's photo a few pages back reminded me of a series I took on a rainy Seattle evening some years ago. These are not my usual photographs at all, but the play of light through a rain-spattered windshield in (stopped) downtown traffic was irresistible, as I happened to have a camera to hand. These from a Tokina 11-16 mm on a D7000, propped above the dashboard. Here in Seattle it rains a lot, and I wear glasses, so this is what my world looks like when I walk around without my hat.
Cheers, John