Red-faced Daniil Kvyat provoked Sebastian Vettel to swear an incredible six times in 17 seconds after he punted the Ferrari driver out of Sunday's Russian Grand Prix.
Daniel Ricciardo is also demanding a personal apology from his Red Bull team-mate after Kvyat's brazen first-lap conduct, in front of his home fans, scuppered his race, too.
Vettel, starting in seventh after a grid penalty, labelled Kvyat a "mad man'' in a toe-curling face-to-face exchange at the previous race in China, and the two men were at it again in Sochi.
Kvyat thumped into the back of Vettel at turn two before crashing into him again moments later. The force of the second impact sent Vettel spinning into the wall, ending his race, and causing the German to launch an extraordinary expletive-fuelled rant over the team radio.
Here's that magnificent team radio from Sebastian Vettel: pic.twitter.com/bPfGP2vR68— Racing Humour (@racinghumour) May 1, 2016
Waving his hands in the air, Vettel blasted: ''F*** sake. Who the f***? Ahh, I'm out. Crashed! Somebody hit me in the f****** rear at turn two, and then somebody hit me in the f****** rear again in turn three. For f*** sake! Honestly. What the f*** are we doing here?''
Kvyat, who replaced Vettel at Red Bull, was subsequently dealt a 10 second stop-and-go penalty.
"What Kvyat did was completely unnecessary," Vettel, who is already 67 points adrift of championship leader Nico Rosberg, said on his arrival back in the paddock.
"I had a massive hit from behind, then another big hit in turn three and that finished my race. As far as I know, the race is 53 laps, but not everybody seems to remember.
"Today it was not my fault, there was nothing I could have done differently, nothing I would change. I don't dislike him (Kvyat), but I think he did a mistake two weeks ago, he made a mistake today, but it doesn't help me now."
Kvyat's team-mate Ricciardo was also caught up in the incident with Vettel unwittingly bumping into the back of the Australian who finished 11th.
"I expect an apology, put it that way," said Ricciardo, who sustained damage to the rear of his Red Bull. "He (Kvyat) owes it to a few people today, so, yeah, let's see."
Kvyat, who crossed the finish line in 15th, said: "I apologise to everyone who is involved and I will learn from it. I think we have to speak. It is easy now to attack me and I guess everyone will, but I am okay with that."