happen out of the blue

"This wouldn't just happen out of the blue, with no warning."

It happened out of the blue Saturday morning, a nursing home employee said.

There are a lot of things that can happen out of the blue.

This isn't the kind of thing that happens out of the blue."

"We were just standing there, going to get something to eat, and this happened out of the blue," Officer Torres said.

In many instances, these cardiovascular events seem to happen out of the blue to people without any of the well-known risk factors.

So much happens out of the blue.

Responding to an interview question as to how we might stop jihobbyists from turning violent, he said "this never happens out of the blue.

"It happened out of the blue.

Some things in life you can't plan for, many major life-turning events happen out of the blue, serious illness, bereavement, marriage breakdown, for example.

And yet-"It didn't just . . . happen out of the blue, you know."

MELANOMA, the least common but most feared form of skin cancer, does not just happen out of the blue.