Hidden Code In Start Menu

This worked on PS2 and XBOX. It has been a long time, maybe I forgot how it works, but I have not been able to hear it on PS3 yet.

In one of the main menus Hold down buttons (I believe shoulder buttons, or combination of shoulder and thumbsticks) until it starts to make a soft scraping type sound. If you keep holding those buttons you can hear a ghostly type voice whispering a backwards message. Long ago I had recorded it, and reversed the audio, it is an invincibility cheat code. I guess it would be easier to just find it online, but it was a cool touch.