>> Virtually the same story from me,
>>but instead of an electromagnet,
>
>In college we sacrificed a telephone mouthpiece in
>the same way.  We knew it would go poof, but it was
>more spectacular than I had expected.  A really
>nice orange flame shot out about 3 feet.

Hadn't heard of using those, but have heard of doing it with the miniscule
3" speakers that came in the pocket transistor radios that were around in
the '60s. Never actually saw one, but the cone was reputed to fly a fair way
across the room.

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