On Thu, 03 Sep 2009 15:43:01 +0100, Invisible <voi### [at] devnull> wrote:

>> Standing under the twin-line set is creepy as hell. They crackle and 
>> buzz quite audibly. The other lines, are very quiet, they don't make a 
>> sound.
>
>Mmm. Petrol station. No naked flames. Switch off engine. No mobile 
>phones. Bzzzzzzzzzzz.
>
>That can't be good(tm)!

Actually it is quite hard to ignite petrol from a petrol pump with a naked
flame. 
Besides having a LEL (Lower Explosive Limit) petrol has an Upper Explosive Limit
(UEL) where above that level the gas/air mixture is too rich to burn. In the
open air the gas/air mixture goes from too rich to too leen very quickly. I once
saw a petrol pump attendant put a lit cigarette into the mouth of a full petrol
tank.

I would not do it myself, though. ;)
-- 

Regards
     Stephen

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