I was walking my dog at night and shot several photos, and only this one got many spherical flares on it, and I can't figure why it happened, since the photos I took immediately before and after this one (which were taken only seconds apart), didn't have any of this.

[![Lens flare](https://i.stack.imgur.com/7mkHp.jpg)](https://i.stack.imgur.com/7mkHp.jpg)