As a teenager I worked in a bulk food store. The job was great. I hung out with a close friend who worked there too and my responsibilities consisted of taking large bags or boxes of food, opening them up, and putting them into bins.
I also got to eat a lot of wine gums and M&M’s.
Customers would come in, grab an empty bag and scoop out what they needed. Cost was based on weight. One of the popular bins (sort of surprisingly), which required at least a weekly refill, was Grape Nuts, the Post-made cereal. The flaw of the system where I worked was that the bins had tiny labels and a few times a week someone looking for Grape Nuts would fill a bag up with textured vegetable protein.
Dried cat vomit also apparently looks like Grape Nuts to Hartford CBS affiliate reporter Scot Haney. During newscast banter Haney, (below, exactly as shown) picks up what he believed was a Grape Nut from the floor and reveals later that he accidentally had eaten dried cat vomit that he had brought in on his shoe.
Yum.