John Carver, the man who will lead Newcastle United on match-days during Alan Pardew's expected ban for head-butting Hull City's David Meyler, may hope to rein in his own temper.
A year ago the assistant manager escaped his own touchline expulsion for a clash at Wigan Athletic following Callum McManaman's X-rated tackle on Massadio Haïdara during a 2-1 defeat.
Carver, 49, was also involved in an unseemly struggle with Craig Bellamy in an airport lounge while he was Sir Bobby Robson's first-team coach at St James' Park.
Pardew has been charged by the Football Association for improper conduct as a result of head-butting Meyler and could receive a heavy sanction if found guilty. He could be given a lengthy touchline ban and perhaps be barred from the stadium completely, as happened to Paul Ince for a five-match spell, after the then Blackpool manager pushed a fourth official last September.
Pardew's notoriously short fuse proved uncontrollable at the KC Stadium on Saturday, so the Newcastle owner, Mike Ashley, has turned to Carver, whose first test at controlling any technical area urges will come during Saturday week's trip to Fulham.
Carver is a Geordie who was on the club's books until a thigh injury ended his career at 20. He rejoined the club in 2011 and two years ago told the Telegraph: "I'm Alan's link with the city. It's like being on the coalface, I know what's going on, what the buzz is, what people are thinking, what they're disappointed with."
On 17 March last year Carver strode on to the pitch at the DW to have a curt word with McManaman that developed into a row with Graham Barrow, the Wigan coach. Both were sent to the stands and subsequently fined £1,000, though only the Wigan man received a one-game touchline ban.
Carver's passion for the club he loves crossed a line then. Yet Kevin Blackwell, who twice appointed him as assistant, when manager of Leeds United, in 2005, and Luton Town in 2007, says Carver should have no problem filling in for Pardew.
"He has had a glittering coaching career and the players will know and respect him because he's been working very closely with Alan," says Blackwell. "I know Alan sometimes has to leave John in charge when he had things to do at United. So, yeah, I think it will be seamless, whether Alan's at the front of it, or whether its John: they know it'll be the same message."
The hiring of Carver, who took temporary charge of Leeds and Luton when Blackwell was sacked, was a no-brainer. Blackwell says: "I thought I wanted someone alongside me who had the same work ethic as I did and has got a reputation for being a good coach, because obviously that's what my reputation was. [And] if I wasn't around I wanted to make sure someone maintained the level of coaching I felt I was giving people – John fitted the mould brilliantly."
Yet as with the confrontation at Wigan, Carver's tangle with Bellamy during his spell at Newcastle as Robson's assistant, from 1999-2004, suggests a quick temper.
In his autobiography Bellamy described how he gradually wound Carver up after parking in his place at the training ground before a trip to play Real Mallorca ten years ago.
Bellamy wrote: "I wouldn't let it go. So by the time we got to Newcastle airport to get the flight to Mallorca, he was at snapping point and we had a confrontation. I was talking to someone else and I mentioned 'JC' loudly enough to make sure he heard me poking fun at him. He snapped and came marching over. I was yelling at him and he was yelling at me, but we were mates, basically, so were never going to start throwing punches at each other. We ended up wrestling stupidly on the floor."
The picture painted is as undignified as the clip that continues to be replayed of Pardew head-butting Meyler at the weekend. As his game-day stand-in, Carver will want no repeat. Blackwell believes his former No2 will start from a strong position with the Newcastle squad.
"John's been at the club quite a while now and [he's] steeped in Newcastle United," he says. "When John came training with me at Leeds he had Newcastle United shirts underneath his tracksuit so it just shows you that he's a dyed-in-the-wool Newcastle man. He worked under Sir Bobby and I know Bobby was a massive influence on John and he would have learned a lot from Bobby and would have picked up plenty from everybody else.
"He'll be well prepared. He actually had a little spell as a manager over in Toronto when Luton went bust. John went for about a year."
Yet even when in charge of Toronto FC Carver was fined $750 (£450) for criticising the referee, Tim Weyland, following a defeat to FC Dallas in April 2009. Then, he said: "I'm having a go at the referee because his performance was a disgrace."
Now, in the Premier League hothouse, Carver hopes to keep his thoughts – and his head – to himself.