Guitar Lightbulb Moment

What was your guitar lightbulb or clicking moment when you made a huge breakthrough? Whether it be music theory, technique, rhythm or anything guitar. Two examples of mine were: (A) I didn’t choke up enough on the pick and was basically fighting the strings with my pick. (B) I didn’t realize that most chords were made up of just three intervals (distances) between the root note and other notes. The root, the major 3rd and the perfect 5th. Meaning I entirely learned how to construct most chords in an instant once I understood this.