Kevin Kisner took a philosophical attitude to the double bogey at the last that potentially cost him the chance to go into round three at The Open with the outright lead.
The American was three under for his second round and eight under for the tournament when teeing it up on the 18th but undercooked an eight iron out of the rough with his second shot, sending the ball into the Barry Burn.
Kisner had to take a drop and left himself too much to do on the green to save bogey, meaning he had to settle for a share of the clubhouse lead on six under with Zach Johnson, though plenty of players still out on the course were in striking distance of the duo.
However, Kisner accepted that the unpredictable nature of links golf means such instances can occur over the duration of a tournament.
"To play 35 holes without a double I thought was pretty good. I've kept the ball in play, done everything I wanted to do all the way up into that hole," he said.
"Looking back, you could hit a sand wedge and a sand wedge and have a good look at 4.
"The way it was sitting, I didn't think it was an issue to get it in one of the bunkers and have a good chance at 4 either.
"It was just one of those things that came out completely different than we expected. I'll live with that more than chipping out and laying up from 20 feet."
Kisner, though, insists he will not lose any sleep ahead of Saturday's play at Carnoustie.
"I sleep pretty good at night. I'm always anxious when I wake up," he added.
"It doesn't affect my sleep a whole lot. I got two kids that keep me up at home, so I like to sleep."
|Kaka tips bright future for Paqueta after Milan agreement|
|Suns star Booker set to return for season opener|
|Warriors coach Kerr not expecting fast start from NBA champs|
|Fultz to start for 76ers as Brown eyes NBA Finals|
|Maltese champions Valletta want Usain Bolt|
|It would have been normal to kill them! Luis Enrique slams abysmal Spain|
|Seahawks, Trail Blazers owner Paul Allen dies aged 65|
|Red Sox ace Sale released from hospital, still set for game five|
|Beer-throwing fan banned by Patriots|
|Southgate lauds ´tremendous´ attackers after famous Spain win|
|Djokovic closing in on summit as he scales new heights|
|Monaco the natural move for Henry - Martinez|
|Ending England drought a ´beautiful feeling´ – Sterling|
|Halep to face Pavlyuchenkova in Moscow comeback|
|NBA 2018-19: Five non-LeBron James storylines to follow|
|Spain 2 England 3: Kane inspires Three Lions as Sterling ends drought in style|
|Bosnia-Herzegovina 2 Northern Ireland 0: Dzeko double leaves O´Neill´s side on the brink|
|Mannarino stops the rot in Moscow|
|Neymar pleased Brazil will not face Messi in Argentina clash|
|Buccaneers fire defensive coordinator Mike Smith after loss to Falcons|
|´Surprised´ Deschamps accepts he could´ve made more effort with Koscielny|
|Kuwait 0 Australia 4: Socceroos deliver win for new coach Arnold|
|Van Dijk fit for Liverpool return - Koeman|
|NBA 2018-19: Eastern Conference predictions|
|NBA 2018-19: Five rookies to watch|
|Denly replaces injured Dawson in England ODI squad|
|Low confirms under-fire Neuer to start against France|
|NBA 2018-19: Western Conference predictions|
|Bolt offered two-year deal by European club, says agent|
|NBA 2018-19: LeBron the Laker - what it means|
|Griezmann ahead of Mbappe for Ballon d´Or - Modric|
|Billy Vunipola ruled out with fractured arm|
|Get the chequebook out! - Mayweather talks up potential Khabib clash|
|Amla ruled out of Australia tour|
|Class act Hamilton more complete than ever - Wolff|
|NBA 2018-19: It´s a big season for - Ball, Kawhi, Carmelo, Love & Cousins|
|Bellew: I have no fear of Usyk|
|Birthday boy Ozil is the most creative player in Europe|
|CSA reveals De Villiers and Rabada involved in Mzansi Super League|
|FA condemns England supporters involved in trouble in Seville|
|Gascoigne hits back over Scottish Hall of Fame snub|
|NBA 2018-19: LeBron closing in on Jordan, Curry chasing Miller and Allen|
|Ter Stegen should start ahead of Neuer for Germany – Matthaus|
|England´s Sterling impressed by Sancho´s work ethic|
|Vandoorne seals switch to Formula E|
|Halep to end 2018 as world number one|
|Sri Lanka´s Jayasuriya charged by ICC with breaching anti-corruption code|
|Vermaelen out for six weeks with hamstring injury|
|LeBron and Irving did not fall out, says ex-Cavs trainer|
|Ramsey out of Wales´ clash with Republic of Ireland|
|Bolt angry with drugs test|
|Bad luck is not a coincidence – Kimmich concerned by Germany form|
|Mahomes: Chiefs need to win like Brady and the Patriots|
|Schuster warns Real Madrid not to panic-buy striker in January|
|We´re here to win! - Paine not happy celebrating a draw|
|Injured Thauvin out of Germany clash|
|Southgate hits out at early Premier League start|
|Modric to Inter talk is ´fantasy´, says Guardiola|
|Pats hand first loss to Chiefs after wild shoot-out|
|Cowboys, Ravens dominate as Pats beat Chiefs in NFL classic|
|Brady becomes first QB to 200 regular-season wins in NFL|
|Red Sox level series against Astros|
|Mbappe leaves red-faced Dembele on his backside|
|Red Sox ace Sale admitted to hospital with stomach illness|
|From UFC to NFL? McGregor throws pass for Cowboys|
|Ancelotti praises ´dangerous´ Mbappe|
|Uncapped Papalii named in All Blacks squad|
|Kane would star in LaLiga – Ramos|
|Guardiola unsure about Man City´s Champions League chances|
|Dzeko: Premier League return? You never know|