The clip comes from Getting Started with Redux, the Egghead video course created and narrated by Dan Abramov, the developer best known for creating Redux for managing state in JavaScript applications. In the lessons Abramov builds a small example step by step, talking viewers through each change in plain language. Short, quotable moments from the course have since circulated among web developers as in jokes and reaction clips. This one survives because the question neatly captures the small pleasure of code behaving exactly as intended.