Irrational Fear #1 - Bridges with Water under them: I have no idea why, you could take me over the highest bridge in the world with no water under it, nae bother - take me over a 20ft bridge with a few feet of water under it....not a fan. 'course coming back from Norfolk once, dad decided to take us over the Humber Bridge, nice
The only real irrational fear I can think of right now
Edit: seeing as how a lot of people seem to dislike wasps/hornets/bees etc, a wee story:
When I was younger, perhaps about 10/12 years ago now - I had a bee fly into my ear and sting me and fly away on its merry way again...'twas a bit nippy to say the least!