Just seeing death all around had pushed you over the edge.
One day she was going to push him over the edge.
History does not record what finally pushed him over the edge.
That alone might have been enough to push her over the edge.
If she let herself go now, she'd push the boy right over the edge, and break something.
It wouldn't take much to push him over the edge.
The last thing anyone wanted was to push him over the edge.
"It must be what finally pushed them over the edge to violence."
Nearly half of them have been pushed over the edge already.
It was more than enough to push her over the edge.