STUTTGART, Germany — Even Simone Biles has trouble wrapping her head around just how good she has become.

On Thursday night, just after she secured her fifth all-around world championship — in what could reasonably be considered the least suspenseful international title event in all of sports this year — Biles was asked to step back and consider the heights she has scaled in the field of gymnastics.

“I don’t know; I feel like it’s not me,” Biles said. “Sometimes I wonder how I do it. I feel like it’s just, like, not me. I wish I could have like an out-of-body experience to witness it, because sometimes I think I’m going crazy.”

Watching video replays of her performances — the types of clips that have spread virally on social media in recent years, transcending the world of gymnastics, delighting hard-core fans and casual spectators alike — does not give her any more clarity.