When it's past your eyes.
He knows a lot about black holes
When the leash goes slack.
Drowns.
He drowned them in the morning.
I told her 'No, thanks. The carton works fine.'
You cannot milk a goat for 13 years
Pupil: Because it has four eyes and can't see!
One to read one to write and the other one to keep an eye on both intellectuals.