What unexpected or unusual thing was he supposed to look for?

We get back to the table, and here is an interesting, unexpected thing that happened.

He was beginning to know a number of unexpected things.

But they were witnesses to the unexpected thing that happened next.

I want people to be surprised, to have unexpected things happen.

In fact, a lot of unexpected things had happened today.

He closed the case and then did an unexpected thing.

Something told her it would be an evening of things unexpected.

Q. What was the most unexpected thing you learned working on your book?

There must be something in him, for his crew to do this unexpected thing.