can't think of any irrational fears (stop me in my tracks, no amount of prodding will work) but i do have a LOT of fears that give me the willies, creeps, shakes, etc.
Hate flying of all kinds,
hate heights (putting christmas lights on the roof - absolutely do not want to do it) but rappelling doesn't bother me one bit (thought it would but did it in basic training and had a BLAST!!),
hate going on lakes or any body of water you can put a boat on,
severely dislike riding in my brother's miata when he's driving (he tries to be impressive by doing stupid speeds in the curves. Heck, he took my Mom's Town n Country through some curves and had all four tires crying - WTF??) but dragging knees on the track or going 170+ is no big deal.
there are a bunch more, but i'll stop there. probably bore most people to tears reading.
