Follow the thoughts of Mr. Barney Calhoun, a Black Mesa security guard and pessimistic individual. In this episode our protagonist slips and slides, coins the term 'head humpers', and shoots some people.
Part 1 - our protagonist almost gets shot, blows up some CO2, and gets locked in a train car. Part 2 - our protagonist finds Dr. Rosenberg, ingests some human body parts, and rediscovers his "love" of elevators.