The sunflowers have been the heartbreaker.
I planted four originally, All four sprouted and two were dug out of the ground by some little beastie. So two grew up big and strong. The smaller of the two, maybe six feet tall showed it's face first. I notice one morning some yellow petals starting to open up. That night Sam called me before i came home from work to tell me the flower had been butchered. Sure enough, the poor thing had been decapitated. That leaves the big one. Best guess at least 8 feet tall, far enough away from the garage that it would be out of reach for a small animal.
Then this morining...this....

FAIL