It's ridiculous that little things like this get so blown out of proportion.
He was trying to keep his supporters up-beat after doing "worse than expected". He was being enthusiastic and holding the microphone a little too close, but if you saw his face when he did the yell, it was clear that he was having a good time - not having some sort of insane fit.
[link|http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=utf-8&safe=off&selm=pqz-80BD4A.10470620012004%40ord-read.news.verio.net|Usenet post] from someone who was there.
Tempest in a teapot, IMO.
Of course, this type of reaction from the press and pundits is nothing new....
I have to admit, though, the [link|http://www.farmgolf.com/Howard%20Dean's%20Crazy%20Train.mp3|crazy train] mix of the audio is entertaining.
There's a Real file of the event at [link|http://www.cspan.org|CSPAN] (it's their Most Watched video at the moment) if you've got the Real One player....
Cheers,
Scott.