I think this is an interesting area... I don't have much capability in this but if anybody cares to put any examples up for us all to look at, then fine. Here's one of mine anyway such as it is...
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INT. TWO MEN WORKING ON THE FACTORY FLOOR. OLDER MAN IS SHOWING YOUNGER MAN, HIS SON, HOW TO OPERATE A MACHINE ON HIS SONS FIRST DAY AT WORK.
SON:
I can show you a better way to do that, Dad!
DAD:
No, you can't
SON:
Yes, I can
DAD:
No, you can't
SON:
Yes, I can
DAD: (frustrated)
Look, son, I've been working in factories all my life and six years on this machine. And this is your first day on the job. So it's me that's showing you, OK?
SON:
Yes, but I can show you a better way to do it!
DAD: (getting angry)
No, you can't!
SON:
Yes, I can
DAD: (getting angrier)
No, you can't
SON: (insistent)
Yes, I can!
DAD GRABS HIS SON BY THE ARMS AND PUSHES HIS SONS HANDS INTO THE MACHINE, AN ALARM SOUNDS, AND THE MACHINE GOES INTO EMERGENCY STOP, BUT IT'S TOO LATE, THE SONS HANDS ARE HORRIBLY MANGLED, HE IS IN AGONY TRAPPED IN THE MACHINE AND THERE IS A LOT OF BLOOD. PEOPLE COME RUNNING TO HELP.
DAD: (satisfied, under his breath)
No you can't!
END