[Trust but Verify]

They could, if that's what it was. I'm sure you're convinced that's what it was, but then, you were ready to beleive they were rapelling on the bridge. Where does something like that come from? Some people have very fertile imaginations.

[Dr. Eckleburg]

The evil-doers have the most fertile imaginations of all.

And they've been putting them into action for a long while now.