Petty Workplace Fights

Workplaces can be petty. Once a group of people are on the clock, they become inexplicably prone to arguing over anything and everything. For the same reason, siblings can go from laughing one moment to head locking each other the next. Close quarters can do strange things to people.

What causes someone to fly into a fit of rage over a stolen stapler? How can birthday cake result in a scathing, department-wide memo?