This is a shot of the experiment conducted by high school (high school!) Health Occupation teacher Donna Gill Allen while teaching her class about germs and how they spread. I imagine a lot of kids learned an important lesson from this experiment. And that lesson is if you're going to make a sandwich with dirty hands, eat it right away and don't put it in a bag or it will get gross.
Thanks again to Jody, who agrees life is too short to care about not eating off the floor.