Like the man on the second floor, they had been taken by surprise.

I was taken by surprise and had nothing to say.

At the last moment I was not completely taken by surprise.

In the capital, I would ever be taken by surprise.

That way, she could see who was coming and wouldn't be taken by surprise again.

For once in his life he was taken by surprise.

At least in this way he would not be taken by surprise from behind.

The other, taken by surprise, followed her a second later.

As a result, thousands of families are being taken by surprise.

Or they can just wait to be taken by surprise.

What an elaborate plan to throw me off my guard!

If so, you certainly have taken us off our guard.

But what a wonderful way to put everyone off their guard!

It had waited, or seemed to, until they were certain of success and off their guard.

He was just trying to put poor Bilbo off his guard.

But even he, for that instant, was off his guard.

So he had not been taken utterly off his guard.

Let him think all's well, and he'll be off his guard.

Both were off their guard, perhaps, feeling as though the worst was behind them.

The apparent welcome was only to throw me off my guard.