dbwes-same with my Yellow Lab, but I love her the best.
She will be walking and bash her head into a small table, shake it off for a second or two, then just keep walking.
She also (and I can NOT figure this out for the life of me) wags her tail in a circle, and her whole body wags with it! I've never seen a dog do that before.
I'm so attached to this dog...we brought her home from the breeder in my lap, and I pretty much raised her (not to mention I was about 10 when we got her, so I've pretty much grown up with her).