Doris made her way to a treadmill. She stepped on and started looking at the controls. For the most part it looked to be fairly normal, except among the vitals tracking information there was a field labeled age. Oddly enough her age was already visible "39 years 11 months 29 days".
"That's so weird. How does it know?" She thought then remembered the necklace she was instructed to wear. It was probably a storage device with all of her information saved on it.
She started up the treadmill at a low speed. As she walked, she was puzzled as the day counter on her age slowly started ticking down. That made her laugh, if only it was that easy. No, she was still going to turn 40 tomorrow no matter what the treadmill said.
She upped the speed and started jogging. Amusingly the age attacker's descend increased as well. Deciding to play along with the gimmick, Doris stayed on the treadmill until it said she was...