I went on a class trip to try star photography for the first time. The assignment was to point your camera and tri-pod at the north star, use your remote, and take a 60 minute exposure. I was getting really frustrated after hours of trying to get a good exposure. They were all coming out unfocused and just looked awful. Most of them weren't even obvious stars. My tri-pod wouldn't stay up right and I'd forgotten a remote so I was using folded paper and a rubber band to hold my shutter down. Not to mention it was like 20 degrees outside (I'm from San Diego). I was finally ready to give up and go home. I decided to make one last exposure. 30 seconds, with the camera set on a table shooting straight up. This is what I got.

I realized later that because I was using a fisheye lens, not only is my unused tri-pod in the image, but my shoulder is too (at the top). The tri-pod in the picture became a lesson to me on not following the rules 100% of the time.