I was deathly afraid of, and intensely disturbed by, the Mr. Yuck sticker and all the commercials. (although, I guess that was kinda the point of them...?)

McGruff the crime dog.

Nuclear war.

Jason from Friday the 13th

Toothy fur balls that would come up out of the toilet and bite your butt if you say on the toilet too long.

Boogey men under the bed.
Originally Posted by redcelticcurls
Dear lord, that's scaring me NOW as an adult! lol