Wenn es hieße "it all fell in place", könnte ich dir sagen, dass es "alles machte auf einmal Sinn".
Aber YOU fell in place???

Ja, das ist aus einem Songtext. Vielleicht hilft´s ja, wenn ich mal den ganzen Abschnitt aufschreibe:

"´We propose a better way`
said the note they left behind
In their wake of disarray
You fell in place"

"He was just so happy - his life had fallen into place just how he'd wanted it to, and then it just got snatched away. He landed the job on Perseus, a dream job with a dream crew, and had the woman he loved working and living with him and their baby.