I'm afraid of cockroaches too, and anything that resembles them in size, shape or movement. Not to the extent that I can't overcome it after the initial shock, but the first sight always results in the "Holy Sh!t" state.
I don't know if this is acrophobia. I don't think I have a problem standing on the 30th floor looking down or out, but once I lean forward, stick my head out, turn around and look UP, I feel my balls shrivel. I had ovenphobia when I was younger, but that's gone now. To varying degree, I could say all of the above.
Something new( and one could say nerdish) would be Internet or hard disk failure.