This picture makes me feel like I can't breathe.
And then I found these HOLY CRAP pictures on Flickr of creepy dolls in a sunflower patch.
Because you know that is where creepy dolls are born.
If I ever want to write horror, here is my instant idea factory.
By the way, there is a Facebook group called "Huge, EVIL sunflowers scare the freaking CRAP out of me!" (their emphasis with large caps). Better believe I am a member.