The indefinite meanings of the French pronoun “on” are related to those of “je”. A reading of the three famous fantasies – “on bat un enfant” (a child is being beaten), “on tue un enfant” (a child is being killed), and “on parle d'un enfant” (a child is being talked about) – allows us to explore the connection between the process of impersonalization, sometimes evidenced by the use of “on”, and the surprise of subjectivization.