Rory McIlroy was left looking bemused after a spectator brazenly walked up to his bag, took out a club and started swinging it, right in front of the former world number one.
McIlroy, a four time Scottish Open champion, was waiting at the first tee ahead of his 8 am start for the second round on Friday morning.
The Northern Irishman was in conversation with his caddie, ahead of playing his round with Jon Rahm and Justin Thomas at the Renaissance Club.
With McIlroy's back not even turned to his clubs, a spectator just casually walks up to the golfer's bag, takes out a club and brazenly starts practicing his swing.
The look on the former world number one's face says it all!
Unsurprisingly the fan wasn't allowed to stay for the rest of the day at the course east of Edinburgh, as he was swiftly removed by security.
He handed the club back to caddie Harry Diamond, with Rahm also looking on in confusion, just weeks after winning the US Open.
The fan did attempt to keep the club head that he'd also taken from McIlroy but did eventually return it.
McIlroy hit a -1, 70 on Thursday, six off the top of the leaderboard at the end of round one, but went round in a shot more on Thursday, following the bizarre incident at the start of the round.
Rahm, who is the current number one in the world having won his first major, currently leads the field.
The Spaniard, who will be part of this year's Ryder Cup team with McIlroy, went round in 65 on Friday, having done it in a shot more in round one.
The Scottish Open doubles up as preparation for The Open next week at Royal St George in Kent.
McIlroy hasn't won a major since 2014 and will be desperate to end his wait for a fifth.
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