How to use "unexpected" in a sentence

The bishop, however, looked calmly at his unexpected visitor.

He did strange, unexpected things, like running up and down stairs without knowing why

Stupefied by the unexpected violence, by the loss of her house, and by her close brush with death, she had seemed to be in a trance; now she had snapped out of it

But if the Explorer broke down in the mountains, or if another hitch developed, they wanted to be prepared for the unexpected.

"He's never seen us or the Explorer, and this isn't the sort of place where there's a lot of new or unexpected traffic."