In this essay, Bergson also asserts that there is a central cause that all comic situations are derived from: that of mechanism applied to life. The fundamental source of comic is the presence of inflexibility and rigidness in life. For Bergson, the essence of life is movement , elasticity and flexibility , and every comic situation is due the presence of rigidity and inelasticity in life. Hence, for Bergson the source of the comic is not ugliness but rigidity.  All the examples taken by Bergson (such as a man falling in the street, one person's imitation of another, the automatic application of conventions and rules, absent-mindedness, repetitive gestures of a speaker, the resemblance between two faces) are comic situations because they give the impression that life is subject to rigidity, automatism and mechanism.