They pinch that's all, make a lot of noise and pinch and then they go away.

It's really kind of hard to believe. You almost have to pinch yourself every now and then.

Add a pinch of phosphorous,

I've got to pinch myself every once in awhile.

Necessity's sharp pinch!

I have long held the opinion that the amount of noise that anyone can bear undisturbed stands in inverse proportion to his mental capacity and therefore be regarded as a pretty fair measure of it.