For those whose friends and family think they are crazy for keeping a bug out bag near their front door, they can tell them: toxoplasma gondii! Check out this funny student video based on a Cracked.com article. The guy who plays Dr. David Archer is hilarious.
Again, as a horror writer, I’m interested in human psychology and how individuals and groups respond to crisis. This interesting short documentary describes the Bystander Effect. Basically, it means that groups of people are less likely than individuals to act to help others in an emergency. Imagine a zombie attacking and eating somebody in a public place, and a crowd of people standing around watching, screaming at everybody else to do something.
The Asch Experiment shows that people will change their behavior to fit in with with other people, suggesting that humans have a conformist, herd instinct.