KHABIB NURMAGOMEDOV switched away from his dad's favourite armbar to the triangle in order to avoid breaking Justin Gaethje's arm in front of the American's parents.
The Russian star maintained his 100 per cent record with a stunning victory over Gaethje at UFC 254 on Saturday night.
But rather than sealing the win with his traditional armbar move, Daniel Cormier reckons he opted for the safer triangle.
Gaethje revealed in pre-fight interviews he would never tap out and therefore Khabib believed he would need to break his opponent's arm in order to secure the win in his usual way.
And so he chose to use the triangle method instead, choking his opponent unconscious to take his record to 29-0.
Former UFC heavyweight champ Cormier told ESPN MMA: "Khabib told me when he was watching the interviews over the course of the week, he saw that Justin said he would never tap.
"So when he was going to the submission get him to the armbar then get into the triangle. He said it was his father's favourite submission.
"When he got there, he was going to do the armbar but he had heard Justin all week saying he would never tap and he didn't want to hurt him in front of his parents so he went to the triangle and put him to sleep.
"He said, 'I didn't want to hurt him in front of his parents so I went to the triangle - if he goes to sleep, he goes to sleep, you wake up and you're fine.'
"To be comfortable enough to think about this in the moment is crazy.
DON'T BE A LONE RANGERGerrard says wife wants him to quit as footie boss for family life
Scott to goSack race: Scott Parker is favourite to be first manager sacked this season
HEAVY VETTELFerrari forced to deny Sebastian Vettel conspiracy theory over his slower car
TESTING TIMESThree Prem stars 'tested positive for drugs last season' but were not banned
SHK TO THE SYSTEMMustafi rejects Arsenal contract and 'intends to leave on free transfer'
IS THAT YOU?Real Madrid fans worried over Isco after training pics show him out-of-shape
RIP JEREMYMan City ex-youth player, 17, tragically dies as Sterling pays tribute
"He didn't want to break his arm because if Justin's not going to tap, you have to break it and he didn't want to do that in front of his mum and dad.
"If he put him to sleep he would wake up and everything would be okay."
Khabib, who was in hospital just weeks before the fight with broken bones in his foot, secured the win in the second round at Fight Island.
And after breaking down in tears, he announced his shock retirement - three months after his dad Abdulmanap passed away aged 57 due to coronavirus.
He leaves the sport as one of the greatest fighters of all time having cleared out the UFC lightweight division.
But he is unable to continue his career without his father, who mentored and trained his son from the age of eight.