on the other hand, you could set a level to the line of his helmet and the bubble would be right in the middle.
Not a cop on a bike, but a short bike/cop story. Not long ago I found myself cycling at 3 in the morning, as you do, and stopping to talk to my voice recorder, as you also do if you get ideas when you ride. Officers in cruiser pull up alongside to ask if I'm alright, and perhaps get a look at why the guy on the bike is talking to his hand.
This is a rural area, not much crime except the occasional gardening implement stolen from a shed. I didn't mind the interruption, and it was a break in what was probably a boring shift for them.
Sorry, that's it, end of story. Just doing my bit to help maintain the profile of cyclists as persons of interest.
A friend and I were pulled over while bicycling in a suburban area late at night. I asked the cop why she had pulled us over and why we were being required to show our IDs. She said that she was investigating some break-ins where TVs and computers were stolen. I told her she was welcome to search my vehicle for the stolen items. Luckily, she just laughed, then apologized for coming on too strong.