Every technology has its mistakes and accidents already built in. This insight is not new, but it is still consistently ignored in an approach to technology that demands it to be controllable and safe, functional and useful. Technical dysfunctionality is 'repressed' by modern society, in a Freudian sense. Functional discrepancies between people and machines are called 'human failures' even in cases in which the technology is making impossible demands on its human user. Machines and their mistakes are thus an inexhaustible source of humour and parody.