I'm sure most of us have them at one point or another. I fear that my time for a serious road accident is overdue. I've not had an accident since 1992 (a minor prang after skidding on some ice). So, I'm a pretty careful driver. I rarely break the speed limit. I take rest breaks on long trips and I never drive whilst over the limit. So why this fear? I dunno, that's why it's irrational! So what is your most irrational fear?