England captain Andrew Strauss hopes Stuart Broad's loss of temper and consequent fine for throwing the ball at Pakistan batsman Zulqarnain Haider was a 'one-off'.
Broad has earned a reputation with some for losing his cool when the pressure is on in the field.
But his transgression on day three of England's nine-wicket Test victory at Edgbaston resulted in an International Cricket Council charge for the first time in his career.
The 24-year-old fast bowler pleaded guilty to 'throwing the ball inappropriately', having hit Haider on the shoulder when he flicked the ball back down the pitch at him at the end of an over on Monday.
Strauss said: "It was one of those situations where the bowler throws the ball back at the batsmen often - but in this particular case, it didn't look good.
"He understood that he overstepped the mark and he has paid the price for it.
"But what I would say is that generally over the summer he has been outstanding in terms of the way he has gone about his business - so let us just hope this is a one-off incident.
"He is maturing - and when you mature you learn from mistakes.
"I am very comfortable in my own head that this will be a one-off situation.
"We have to remind ourselves all the time that there are lines there that you don't want to overstep. Stuart received a timely reminder of that."
Strauss is not planning to make a point of speaking to Broad about his future conduct.
"It was a one-off incident, and I know it wasn't a deliberate thing," he said.
"It was an end-of-the-over chuck-the-ball-back when the batsman had gone down the wicket.
"I don't think he meant to hit him - he was just throwing it back to the wicketkeeper. I've got no issues with it."
Broad was fined 50 percent of his match fee for breaching the ICC's code of conduct.
Match referee Ranjan Madugalle disciplined Broad, who appeared to have acted out of anger after Haider had earlier survived a caught-behind appeal - despite England calling for a review.
Broad was charged with a Level Two offence under article 2.2.7 of the code and received his punishment without the need for a full hearing, thanks to his guilty plea.
Madugalle said: "The actions of Stuart Broad were unacceptable.
"I understand the frustrations of a bowler in the heat of the moment.
"But as an international sportsman, one needs to control these emotions - whatever may be the situation - and always respect the opponent.
"Stuart, by pleading guilty, realised his mistake - and I'm sure he will not repeat the same again."
Broad's team-mate Graeme Swann played down the incident, but Strauss' opposite number Salman Butt was not quite so forgiving.
"Cricket is a gentleman's game, but I think they got frustrated," he said.
"The throw was just one thing. There were plenty of words as well, and people kicking the bowling marks.
"It's just frustration when you have been bowling too long. It's not good to see people throwing balls intentionally at others and not even apologising properly."