The training PDF essentially teaches you to trigger that state on command. You aren't changing the universe's clock; you are changing your processor speed relative to the universe. If you can’t find the PDF or don't trust random downloads from Google Drive, here is a safe, free routine based on those original exercises:

Listen to a song you know by heart at normal speed. Then, listen to it at 0.5x speed. Then at 1.5x speed. Mentally rehearse what "normal" feels like. Eventually, try to imagine the song playing at 0.75x without actually changing the file.

Disclaimer: This post is for informational and entertainment purposes only. You are responsible for your own mental and physical health.