From Consumerist

There's been a big stink about how AIG has given a bunch of taxpayer money to other banks. Why why why, demand the American people. Well, it's not like they enjoy shoveling money out the door, wait, scratch that, but anyway, the real reason is because of something called "collateral calls." Marketplace's Paddy Hirsch explains the situation with the help of his friends Mr. Magic Marker and Mrs. White Board in this video.