The fourth official should be watching the TV monitor and talking to the referee.
Fourth official Lee Probert advised Dean after Wenger kicked a water bottle following a disallowed Arsenal goal.
Just prior to Kanoute's goal Wenger was ordered to leave the technical area for remonstrating with the fourth official.
The experienced whistler was due to work as either referee or fourth official before retiring at the end of the season.
And, in championships, a fourth official is appointed to stand in if there is conflict of interest with a judge or referee.
There is now a fourth official U.S. stock market to contend with.
After the fourth official indicated four minutes of added time, 56 seconds passed between Bellamy's strike crossing the goal line and play restarting.
Substitute Owen slotted past Shay Given to seal a thrilling 4-3 win for United, despite the fourth official having indicated only four extra minutes.
Wenger was fiercely animated throughout, prepared to bandy words with anyone from fourth official Peter Walton, the Chelsea management team to even his own players.
When the fourth official indicated four minutes of injury time it was Villa who seemed most likely to go on and snatch a last-gasp winner.
On that charge, Lennon was found guilty of "excessive misconduct" following an altercation with fourth official Steven McLean in an away defeat by Hearts in November.
BBC: Ally McCoist and Neil Lennon receive Hampden final bans
At one point, after he felt Anderson was denied a penalty, he jabbed his finger at fourth official Mike Dean and then pointed angrily to the pitch.
Warnock angrily confronted the fourth official and, after his appeals to the opposition dug-out went unheeded, refused to shake hands with some City players at the final whistle.
The two managers were at loggerheads on the touchline during the game, with the Arsenal boss complaining to the fourth official that Hughes had left his technical area.
At one point, after he felt midfielder Anderson had been denied a penalty, he jabbed his finger at fourth official Mike Dean and then pointed angrily to the pitch.
The 49-year-old Wiley was fourth official in the recent Manchester derby when United beat City with a controversial 96th-minute goal, after four minutes of stoppage time had been signalled.
The Frenchman has accepted a charge of improper conduct and will serve a one-match ban after appearing to confront fourth official Martin Atkinson about the amount of time played.
On Tuesday, Lennon was given a six-match ban for an outburst towards the fourth official, as he was sent to the stand during a match at Tynecastle in November.
Referee Anthony Taylor initially pointed to the penalty spot but the Cheshire official changed his mind after consulting with fourth official Mark Russell - and instead booked Bellamy for diving.
Ferguson and Benitez were then involved in an angry exchange almost nose-to-nose in the technical area, with fourth official Marriner in between the pair in an attempt to keep the peace.
Among other misdemeanours, Ibrahim Hassan assaulted the fourth official.
All four match officials -- the referee, his two assistants and the fourth official -- wore microphones and ear pieces that allowed them to hear what each other was saying throughout the match.
The Detroit, Michigan-based group The High Strung may have recorded hundreds of tracks together before actually releasing an album, but Ode to the Inverse of the Dude marks their fourth official studio release.
During his career, he has taken charge of more than 100 international appointments, as well as two Scottish Cup finals, one League Cup final, and he was a fourth official at the 2004 European Championship in Portugal.
But the two coaches subsequently revealed that they had been informed by the fourth official that the clock had been stopped in error and that the referee would blow the final whistle earlier than the official timing indicated.
The visitors needed some breathing space and were given it when Keane was shown a straight red by Phil Dowd, after consulting the fourth official, for a tackle on Muamba that was late but did not appear to be malicious.
Rutgers announced Thursday that former interim senior vice president and general counsel John Wolf has resigned from his post as a university attorney the fourth official to leave in the wake of revelations of abusive behavior by former men's basketball coach Mike Rice.
WSJ: Rutgers Basketball, Mike Rice: Rutgers Lawyer Steps Down
The Hearts manager, who would have had to sit out matches against St Mirren and Hamilton Accies if he had accepted the automatic ban, clashed with John McKendrick as the fourth official tried to stop him entering the Tynecastle pitch at the end of Saturday's game.
Liverpool boss Rafael Benitez, who confronted fourth official Andre Marriner and United boss Sir Alex Ferguson after Rooney's equaliser, was infuriated by the penalty award - and was also animated throughout by what he clearly regarded as a succession of contentious decisions that he believed went in the home side's favour.
He wants to become the House Speaker, the country's fourth-highest official.
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