>>> Why do overhead cables never flap around in the wind?
>>
>> Actually they do, it's just it's usually very fast and very low 
>> amplitude flapping.  Imagine holding out a stretched violin string in 
>> the wind, it's not really going to flap is it?
> 
> Indeed, in strong wind you can actually hear such cables "sing".

I don't know about that, but I *do* know that there's a particular 
petrol station I sometimes go to, situated under a ****ing huge set of 
pylons. As soon as you get out of the car, all you can hear is an 
unearthly crackling sound... I can't describe it, but it's really 
quite... worrying.

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