I am not equating a 10 year old with an abusive adult male.
I am suggesting that everyone starts somewhere and that it is important to give him tools to deal with (perfectly natural) feelings such as anger, frustration, annoyance, fear and panic so that he will not continue with his habit of communicating by means of dramatic gestures. The gestures are the easy way out and can be a very tempting shortcut as a child gets taller, and his voice gets deeper.
melj You are extrapolating your experience with an abusive ex and painting any pre-teen boy who isn't in total control of his emotions at all times as a potential abuser.
I know how my exH got started.
He was inclined to 'explode a bit when pushed' as a child. His family thought it was great that he could know his own mind so well, didn't suffer fools gladly, etc. Then it wasn't so funny when he was a strapping teen and was hard to approach if he was in a mood because someone overtook him when he was out driving, or he took exception to something his summer job boss wanted him to do, and his response was to curse him out, walk off the job, and punch holes in his bedroom walls.
I taught my DS a different set of responses - not to take things personally, to see problems as opportunities for problem solving, to respect himself and trust others to be reasonable, above all not to make excuses for himself if he fell short of expectations and to accept the perceptions of others as to how his actions came across. It was a lesson that took place over the course of many years.
A child is allowed to be angry. He is not allowed to slam a glass on a table and shout. That is not hard for a 10 year old to understand.
If he understands that what he did and said may have come across in a different way from how he intended, then he could consider apologising. It is always a good thing to point out that other people have perceptions and feelings and to ask that a 10 year old be mindful of that is not unrealistic. It is not unrealistic for a 5 year old.
Any apology should be sincere and based on a genuine understanding of what he did, though. Otherwise people are asking that he jump through hoops for appearance sake just as he might have been expected to nibble at an unwanted sandwich thirty years ago.
There are a few approaches that can cover many situations - one is to ask yourself 'what is the worst thing that could happen here?' if (a) I do the thing, or (b) I refuse to do the thing. This helps to give a child confidence to handle the situation - he realises that a person in a situation like this only has persuasion in her arsenal and 'no, thank you' can indeed go on until she wearies of it. He has to trust this.
The other approach is to find a way to help her back down if she is not able to back down herself - hence 'They look lovely, but I am afraid I have been so greedy I can't fit another bite' or words to that effect. It is up to her to take the offer of a compliment and back down. Yes, she could be very persistent even so, but keeping on repeating will eventually cause it to end. The child is being asked to do some work that should not be necessary, but it will help him grow up.
If a child tends to explode, it behooves parents to try to anticipate situations that might come up, maybe by looking back at explosions of the past. They could also ask the DS if he can think of any situations that might cause him anxiety.