Are bed knobs at the top of a bedposts scary to anyone else?

When I was a boy from about age 3 to 8.I was frightened of my bedpost knob because it looked like it had a cycloptic eye reflected from my nightlight.I used to have nightmares that it would float off its bedpost and terrorize me with a deep scary voice.It seemed real and not a nightmare.I dont know if it might have been a sleep paralysis hallucination or just a vivid nightmare.It was recurring though.It stopped for the most part at about age 11.