Kiwi running phenom Sam Ruthe is out to set a world record.
The 15-year-old wants to become the youngest person to ever run a sub-four minute mile.
He's having a crack at Mt Smart tonight, and Newstalk ZB sports reporter Elijah Fa'afiu is there.
Elijah spoke to D'Arcy Waldegrave on Sportstalk.
LISTEN ABOVE
See omnystudio.com/listener for privacy information.