He started, then stopped, because something else had suddenly popped in his mind.

A photograph of the page suddenly popping into his mind's eye.

"No reason to think he'll suddenly pop in on us now."

Do they think we're going to pop suddenly out of the ocean or something?

You never even noticed them for years, and then they suddenly popped into focus.

A number of other small objects suddenly popped into view.

Something she had read years ago suddenly popped into Laurel's mind.

The lid suddenly popped open and two men stood up.

He paused as a thought suddenly popped into his head.

Sterling asked, suddenly popping into being in front of her.