I love this stage in the flowering process. They look as if their Medusa-like sepals are being sucked by some invisible force. Resist little flower, resist!
If you plant sunflowers from seed and have a squirrel problem, be sure to cover them with some mesh that will still allow for light to come through or some other device (e.g., over sized recycled water bottles, or a recycled clear plastic jar...just be sure to add some holes for air circulation)...then all you have to do is find a comfy chair, sit, relax and enjoy the show.
NOTE: sunflowers resent very much being transplanted. I start mine in peat pots so that the roots won't be disturbed when I place them in their permanent home in the garden.