En quinze secondes, la différence entre composition et improvisation tient au fait que, lorsque tu composes, tu as tout le temps, que tu veux pour penser a ce que tu vas dire en quinze secondes, alors que, lorsque tu improvises, tu ne disposes que de quinze secondes.

In fifteen seconds, the difference between composition and improvisation is that in composition you have all the time you want to think about what to say in fifteen seconds, while in improvisation you have only fifteen seconds.