Bill saw the earlier post on the sage grouse and found this fantastic video of a male sage grouse doing his mating dance. When my sister's fiance asked my Dad to marry her, my Dad and I both had him do a similar dance to prove his worth. He had a bit of trouble with the air sac thing initially, and we had to improvise on the tail feathers, but it turns out that he's great at beatboxing, so he's in.
Thanks, Bill.