Ok, it seems the overwhelming vote is that this is normal, but ol' Henry looks like he's having a stroke! I was pretty sure it had to be some kind of semi-normal activity, but I don't ever remember seeing it in chickens when I was young. I guess I was too busy playing to pay attention.
I...
I have a barred rock rooster that has exhibited an unusual behavior and I've only seen it when he's been around the 'ladies'... And no, I'm not talking about that...
I have uploaded a 5 second clip to YouTube so you can take a look and tell me if this is something I should be concerned about...