I suspect your sudden appearance here has something to do with those reports.

This sudden appearance of people long since given up for dead will present some problems.

"I've word on the matter of your sudden appearance in this world," he began.

But intelligence must have made a sudden appearance for this to happen.

Their sudden appearance came as a total shock to him.

However, the sudden appearance of a real ghost makes everyone run for their lives.

I think he'd made to catch it, and might have, but for my sudden appearance.

She wasn't quite sure how to respond to his sudden appearance.

It was as if I were somehow waiting for the sudden appearance of something.

Well, put it this way your sudden appearance has not made one bit of difference to my day.