I was pulled over for my plate being run. I was going the speed limit, signaled to change lanes to the left, got over, and he slammed on his brakes to get behind me and turned his lights on. He said he pulled me over for my registration being out (right... his front bumper was at my door almost the entire time until he fell back a little to get my plate, not to mention that he was on my RIGHT).
The real reason he pulled me over? My mom's neighborhood had an armed robbery, and my car was registered at her address. The cop tried giving me shit over having a different address for insurance and registration (wrote a check to the dealership and they did all the paperwork w/ the address on my check). The entire time he was near my car, he had his flashlight out and was trying to look in the backseat and trunk. I almost offered to open the car up and let him look at how empty it was.
He also asked me if I had my contacts on after seeing the corrective lenses part on my license. I offered to show him, and moved them around in my eyes before he even answered. Yes, both eyes, he saw me do the right one and asked about the left

When I first did my right eye, it was "too fast" for him, and he wanted to see it again. So I leaned out the window as far as I could, and showed him, this time slowly so he could process it
To be fair, at this point I turned into smart ass mode. He had a lot more pointless questions he asked and I felt that what he was doing was plain harassing. I bet he was pissed that he couldn't find anything to give me a ticket for.
He didn't even ticket me for the registration either (it was only a week or so out). It was a waste of 10 minutes for both of us, even more so for him, as he could have been doing something a lot more worthwhile.