[Quiet Man Cometh]

Saw them on Think Geek but not abotu to spend the money.

Lestrade, I imagine the motions aren't random but the trick is getting your brain waves to sync with what you are physically doing. From the brain wave game I did I know that if I focused on one thing visually, my brain waves dropped, but if I focused on my hearing, they rose, so chances are my "ears" would be perky while I was walking around not particularly paying attention to stuff, but droop when I was talking with someone. Of course, the mechanism to read brainwaves has to be reliable. Had to do a lot of adjusting with that game. Low battery made a difference too for how well it "read" things.

I've seen cats with sideways ears, but they were usually nearly half asleep, or very relaxed looking. There's only so much realism one can get with clunky ears on a headband. ;)