Caffeine is a coffee bean's natural protection.  It coats the bean, so
that bugs that try to eat the bean get so buzzed that they literally run
around in circles until they die.  So it seems that making weasels eat
coffee beans would semi-decaffienate and deacidify the bean and at the
same time very much caffeinate and acidate(?) the critter.  Not nice.
They probably vomit because it's terrible for them.  Of course, to put
things into perspective, it's probably better for them than being
deepfried and coated in chocolate.

--Clover
and the rezweezils: Buddy, Butter, Buster (aka Fatboy), Lew, and Marissa=

"Always selling quality bedding and other goodies to help the ferrets!"
http://search.ebay.com/_W0QQsassZwclovergalQQhtZ-1
[Posted in FML issue 5276]