Decapitating ladders

Does anyone else have the same irrational fear of ladders on trucks and vans as I do? Every time I'm behind a vehicle with a ladder strapped to its roof, I imagine the ladder sliding off the roof, crashing through my windshield, and decapitating me. It's a strange paranoia I have, and I'm not sure how it developed, but it never fails to make my heart skip a beat when I see a ladder being carted around out on the roads.