As holoween approaches you may be able to find out about the
secondary brain (gut brain) from the same source as me.  I read about it
in a page on fear and reactions to fear.  Some people get so scared they
sh|t their pants because the gut brain reacts to danger by emptying the
bowels.  Sometimes people get so scared they puke because the gut brain
reacts to fear by reverse parastalsis.  The idea is combat readyness,
which is one reason few of us do the later and fewer still do the former.
        It was a link on Netscapes "What's Cool" section.