It was not until then that an idea struck him.

As the words left my lips, another idea struck me.

As if from the stars beyond the door, an idea struck through.

An idea struck me and I repeated the question in my mind.

I half rose to go and look, but changed my mind, because an idea struck me then.

An idea struck him, something he could do, even so far away.

Just then, however, another idea struck me, and I got up quick enough.

He was about to go on when a sudden idea struck him.

He can't go up there alone, she thought, when another idea struck her.

Then an idea struck him, and he sat for a time in silence, thinking.