Back in the 70's, J.C. Whitney used to sell a thing they called "Winky the Cat". It had light bulb eyes that would flash along with the turn signals. I saw this "Winking Tiger" listed on e-bay that is a variation of the same thing.
Why just have a boring center brake light?
Attachment 4748
Everyone needs one of these:
Attachment 4749
This would give the guy behind you something to look at:
Attachment 4750
Attachment 4751