Fans spotted that Luke Littler made a subtle change during the fifth week of Premier League Darts - and then produced an incredible shot.
'The Nuke' beat Michael Smith 6-2 in the quarter-finals in Exeter to set up a last four clash with 2018 world champion Rob Cross.
But an in-form 'Voltage', who defeated Gerwyn Price 6-1 in his opening round match, ultimately had too much for Littler and won 6-3.
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It was Nathan Aspinall, though, who won the night in Exeter, beating Cross 6-2 in the final after a tense 6-5 win over Luke Humphries in his semi-final.
Aspinall thus moves up to fourth in the overall table on eight points, with third-placed Cross and second-placed Littler both on nine. Michael van Gerwen leads the way on 15 points.
During the action in Exeter, fans spotted a notable yet subtle change to Littler's game.
It was spotted, via @KongrawDarts, that Littler was using a slightly modified version of the Target darts he has used since the World Championship.
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Noticeably, the barrel of darts featured yellow and purple circular rings, in a difference to his previous set.
And the 17-year-old promptly went and hit a 180 with his first throw in the quarter-final against Smith.
'The Nuke' went on to average almost 107 in his victory over Smith, and was briefly on a nine-darter in the eighth and final leg before missing treble 20.
Some of the top darts players have different sets of darts that they will use during matches.
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Two-time world champion Peter Wright often changes his darts mid-match, and explained the reason why last year.
He told PDC Europe: "I don't like negativity in my mind and sometimes I get a set of darts, like everyone says use them Diamond darts, and I hate using them.
"I can only use them for about two weeks, and then they start doing my head in because, on the practice board, I'll be going near enough in the 12s going for 20s and it shouldn't be happening.
"Instead of trying to work through and make yourself more angry and upset, I just pick up another set of darts and make that set of darts work."
Topics: Luke Littler, Darts, Fan Reactions
Ryan Smart