Vince Wolfhagen had a day to remember for Northern Rangers.
Having played a full under-18s game, scoring the only goal in a 5-1 loss to Launceston City, the teenage striker was on the bench in the teams' Northern Championship fixture and called into action after an early injury.
Grabbing his opportunity with both hands, Wolfhagen scored a hat-trick in his side's 3-0 win.
"He was a last minute inclusion when one of our subs could not make it," explained Rangers' coach Rod Fulton.
"Then our striker got injured after 15 minutes so he came on and ended up playing 165 minutes today. He's a great player, so well balanced and calm and always seems to have more time on the ball than he should have.
"The 18s are going to want him back but I don't want to let him go."
In the other city derby, Riverside Olympic were reduced to 10 men following an early red card but still beat Launceston United 5-2.
Mitchell Jones converted an early penalty before Fahim Moradi equalised on the half hour.
A superb performance from goalkeeper Sol Thowe enabled Olympic to dominate despite their numerical disadvantage.
Two trademark poacher's tap-ins from Josh Taylor and two excellent solo goals from his Mowbray Cricket Club teammate Ben Bodha had United stumped despite Nathan Butler's late consolation.