The Nerd said:
What should of happened....
I'm sorry, but I have to stop you right there.
It's 'should have'...NOT 'should of '.
This grammatical faux-pas is getting more and more pervasive, and must stop.
At least you used it correctly in you second paragraph. :)
Anyway, the scene should have had Vader mumbling under his breath, with a few curse words slipping out.