He wants us out of the way to save his neck.
Now he had to think to save his own neck!
So why don't you save your neck and turn him in?
It might turn out to save his neck as well.
The first thing I told her was how you saved my neck.
Sometimes you just have to save your neck and work out the details later.
That's the sort of thing that saved my neck in the end.
They'll have to believe it if we save our necks.
And the dozen other times you saved my neck, or tried to.
What's more, some of that work went to saving your neck.
Idiome