Examples of this idiom:
- Scotty, my dog, was afraid of his own shadow when he was a pup, but now he barks like crazy at other huge-ass dogs.
- You think Penny will come for the horror movie? She's afraid of her own shadow!
Meaning:
Very easily frightened, especially of small or imaginary things.
Image credits: http://www.virb.com/
Image credits: http://www.virb.com/