Okay, it was a little funnier when I read it out of context on Boing Boing:
He came up with the idea after his sister Sarah complained that Elvis was keeping her awake at night by playing for hours on his exercise wheel.
But the article’s still missing the important “his pet hamster, Elvis” part. Personally, I think it’s much more amusing to think it was Elvis Presley (or Costello…or Mitchell…or, heck, even Duran) in the exercise wheel that was keeping Peter’s sister awake at night.