Danny Ward came off the bench to score a second half hat-trick as Huddersfield capitalised on an abject Watford performance to end the season on a high with a 4-1 victory.
After a goalless first half, Joe Lolley fired the visitors in front within a minute of the restart and they never looked back from that point.
Ward, who had been a first-half replacement for the injured Nakhi Wells, went on to score three times - twice as a result of errors from Hornets keeper Jonathan Bond - before Troy Deeney netted a late consolation from the penalty spot.
Town manager Mark Robins said: ”I’ve said for a long time Danny gets himself into unbelievably good positions and doesn’t always deliver with the finish. In training, he does, so it’s there, it’s in him.
“People know him as a winger but when he was at Swindon he played up front with Charlie Austin and for me he’s better in the middle. He delivers a lot more and he’s less isolated than out on the wings.”