I was scared of one thing when I was a kid: The Channel 4 logo.
When it appeared on the telly, I didn't like the blocks in the logo flying round and forming the number 4.
I also didn't like the four note jingle that went with it. My parents tried to persuade me to watch the logo but it didn't work sadly, I just couldn't look at it. Plus whenever my mum would say to me 'switch over to 4 for brookie', I'd change the channel and run upstairs. Very strange phobia I had...
The answer came when my mum emptied my box of legos and asked me to make a number 4 out of them, it took a while for me to overcome the fear and it worked.