Rice panic of 2008

Dear Consumers,

I have been reading about your irrational response to the rice futures market. Currently Costco and Sam's Club is preventing you from buying multiple bags of 40lbs basmati and jasmine rice. Are you crazy consumers going to export your rice or something!? Do you think rice is going to be like $40 per pound or something? You are causing me, who doesn't even like rice, to think about buying a 40lb bag JUST IN CASE! Don't Panic! What is it about grain prices that cause people to go all a twitter!