Gaudí had, already of child, a spirit of observation that gave him a direct knowledge of the facts, with which he liked cutting the superficial interlocutors. One time, the teacher of Gaudí boy explained to class that the birds have the wings to fly, and he interrupted him saying that: "The hens of home can not fly and only use the wings to run more quickly”. The teacher came off surprised without knowing what to reply in defense him his too elementary affirmation. (Anecdote explained by the Gaudí himself and collected by his disciple Joan Bergós)