Believe it or not I got scared when I pass under high voltage power lines. This started when I was about 8. I try to avoid them whenever possible, and when I have to go under them I walk as fast as I can. I do not dare to look up before I'm sure I'm clear. When I'm not alone I can control this fear much better (so good that it's almost unnoticeable) , even when I'm with someone whom I don't trust. I think I'm mostly afraid of getting electrocuted from a cable that is too close to the ground, because this may have a connection to the fact that I'm blind on one eye and therefore I can't tell distance of an object.
I don't remember why and how I became afraid, and I'm probably the last person on Earth who should have such phobia. I studied physics so I have a good knowledge of electricity, and I also have a good understanding of engineering and safety involved in construction of power lines.
I work with electricity since I was 12 (all house repairs and more), I was shocked few times, and few times I had good chance of getting killed. Despite that I have no fear of electricity, I even touch live wires after making sure I'm properly insulated from the ground. Once when I was repairing an old TV I had to tune it while it was on. So I sat on one wooden chair and placed my legs on the other, and without fear plunged my fingers into 30 000 volts. My only fear here is getting burned in case of shorting out, but I also get this when working with angle grinder or arc welder, so it's not electricity, but hot sparks.
Safety is one of primary goals to engineers who design power lines, and I'm perfectly aware of that. Minimal height of 400 KV power lines (the ones that scare me the most, the ones that make loud sizzling noise) is 5 meters. Even on pouring rain you would have to get closer than 2 meters to the cable in order to get shocked, so I know I'm perfectly safe.
One of my most frequent nightmares is running into fallen cables or cables that are very close to the ground, so close that you would get electrocuted even if you crawl. But I perfectly understand that it would take lots of freezing rain and a hurricane to bring 400KV lines down, we don't have that kind of weather. Power lines with lower voltage are much easier to bring down, and it happened few times in my area, but illogically I'm much less afraid of them.
When I was a kid (4-5 yrs. old) I was afraid of thunder, but that fear is now gone.
If I'm in a car (which is a Faraday cage), I could seat under power lines for hours without fear. Strangely, in that case I can control my phobia because I know the car is safe. Also, I walk under 138KV line every day, and it seems that I'm used to that, my pulse barely changes.
The strangest thing is, if there was say 500 000 volt line close to ground where I can clearly see it, I could approach it (maybe with a little cautious fear), within a safe distance of course.