Meaning of the phrase: "...blinked, looming behind me"
I'm reading Another Fine Myth by Robert Asprin. There is a sentence in one of the dialogs that I do not understand. The story is told from the main character Skeeve point of view. The sentence is:
"What tent?" The keeper blinked, looming behind me.
What is the meaning of "looming behind me" part? If the keeper is standing behind Skeeve then Skeeve can't see him blinking. Is it the mistake of the author or "behind me" means something other?
Context:
"WHERE did that tent go?" I demanded desperately.
"What tent?" The keeper blinked, looming behind me.
"That tent," I exclaimed, pointing at the now vacant space.
The Deveel frowned, craning his neck, which at his height, gave him considerable visibility.
"There isn't any tent there," he announced with finality.
"I know! That's the point!"
"Hey! Quit trying to change the subject!" The keeper growled, poking me in the chest with an unbelievably large finger. "Are you going to pay for the dragon or not?"