A/N: This is just something I wrote a while ago and decided to put up while I'm writing some other stuff. Crappy title, I know :). I made up the riddle in English class.
Jonathon Crane was sat on his metal cot, in his cell at Arkham Asylum. He was reading an article on the amygdala, in a magazine on neurology he'd managed to sneak past the guards. He was distracted by the man lying outstretched on the other cot, Edward Nashton, otherwise known as the Riddler. He'd been blissfully quiet for the past few minutes, but from Crane's experience such times when his cellmate wasn't talking about something or other were generally brief.
"Scarecrow! Want to hear a riddle I just thought up?"
Crane rolled his eyes "Why do I get the feeling you're going to tell it to me no matter what I say?"
He was right: "Have a little faith. Besides, I think you'll like this one..." Edward cleared his throat dramatically,
"I begin as a bodyguard
and end as a stalker.
I wear a different coat for everyone I follow.
When you hide from me, I grow.
When you look me in the eye I shrink.
What am I?"
Edward waited for his customary ten-second allowance for comprehension, then was just about to continue speaking when, much to his surprise, Crane actually answered it.
"It's fear. More specifically a phobia."
Edward rolled over, both amusement and slight irritation written on his face. "Told you you'd like it."