Quote:
Originally Posted by PYROLYSIS
It doesn't have to ignite to explode. Everything around it (plastic, rubber etc) burns and it becomes hot enough to be a problem when water is added. Those indy car wheels don't ignite because they're out in the open with nothing around them. The little bits of magnesium in cars now can be dangerous but for the most part just put on a good fireworks show for a fireman that's properly wearing his gear. A large amount would only make things more dangerous for firemen but automakers have never really been concerned with that.
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My brother F/F has it spelled out pretty well right here...