Ergot (a common toxin created from the mould found most often on crackers - yea the snack style crackers) is a very strong halucinative drug... its BTW what they make LSD from....
I wonder if eating 999 crackers a day will put me on a trip <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
This is also the reason why you should never give a person with alzheimers crackers or any type of preserved biscuits... only freshly baked items... There is evidence that this makes ulzheimers worse.... and also questions about if the consumption of small amounts over years, can CAUSE alzheimers....