I started studying herbalism and edible plants that existed...

I started studying herbalism and edible plants that existed in the wild. And then I realized, "Okay, cool. I know how to make a fire with sticks and I know how to build a shelter, but I live 90 percent of my life in an urban environment, so these skills aren't really going to help me because there aren't trees that grow in Los Angeles that I can just take a branch and make fire out of, because that wood isn't conducive for that. So I started learning urban survival skills.