Key and Peele’s ‘Substitute Teacher’  sketch is an example of linguistic modification humour. In this sketch introduces a black substitute teacher from the inner city into an all-white classroom and uses the students’ names as an example of their social division. The humour of the video derives from the stereotypical ‘whiteness’ of the students’ names and the contrasting ‘blackness’ of the teacher’s pronunciation.
Sigmund Freud’s ‘Jokes and Their Relations to the Unconsciou’ describes words as ‘… plastic material with which one can do all kinds of things … There are words which, when used in certain connections, have lost their original full meaning, but which regain it in other connections’ . He breaks down linguistic jokes, which he calls ‘double meaning jokes’ into three categories; condensation, multiple use of the same material, and double meaning . Key and Peele’s video is an example of multiple use of the same material because it presents the same words with slight modifications to evoke a humorous response. Freud takes his argument further and suggests that all of these jokes must be examples of condensation given that a ‘… play upon words is nothing other than a condensation without substitute-formation’ . However, this video is an example of how multiple use of the same material does not necessarily mean word play, it can mean manipulating a word outside it’s typical form. Key and Peele take the students’ names and turn them into contorted versions of their original, but they do not attach a new meaning to them.
This video is an example of a joke that challenges Freud’s theory and the notion that there is a rule of thumb for the formula behind jokes. The sketch highlights some of the flaws in his ideology and asks the viewer to question his rhetoric.
 Freud, Sigmund. ‘The Technique of Jokes’ and ‘The Purpose of Jokes,’ Jokes and Their Relation to the Unconscious (London: Vintage/Hogarth, 2001), 22.
 Ibid, 28.
 Ibid, 29.