Alas, this is courtesy of another man's Flickr, not my own photo. I -do- have a box of Donkey Kong cereal around somewhere, or at least I did...

Nutri-Grain cereal was infamous amongst my friends for leaving one feeling like you'd been eating spackle, this unpleasantly leaden weight in the gut after. Seems this was a shared sentiment since it went on to mutate into cereal bars and other such things.