I realized to my horror that I'd made a mistake.

The men quickly realized, to their horror, that it was the sound of stampeding horses.

Squinting hard at them, I realized to my horror that they had all stuck themselves together.

I realized to my horror what had just happened.

Then I realized to my horror that Sticks was gone.

Then he realized, to his horror, that they had all heard this before.

And realized to her horror after one tug that it was all she could do to hold on.

She suddenly realized, to her horror, that the decision was hers.

It was not sleep, the young scholar realized then, to his mounting horror.

There's no one here, I realized to my horror.