Have you ever watched a colleague charm the pants off management while showing a competitive, Machiavellian side to the lower ranks? They happily throw peers under the bus, but their boss is oblivious to their bad behaviour. What about a constantly interrupting colleague, or an over-bearing manager? Margie Hartley speaks with Professor of Psychology at New York University and author of 'Jerks at Work,' Professor Tessa West about how to spot a jerk at work, understanding their motivations in order to deal with them and the best way to manage and respond to poor behaviour in the workplace.