I once walked out to a police cruiser blocking me in after my shift. I asked the officer politely if there was an issue.. I had colored license plate covers on too, so I felt extra nervous. I admittedly pointed them out and asked "Is it these, sir?" and all he said was "Oh, no buddy don't worry about it. There's a guy in the city with a similar car who just ran from a drug bust." He saw I was leaving work with my uniform on so he left. It definately got me going though!