He couldn't believe that thought had popped into his mind.

The second the thought popped into his head, he pushed it aside.

An absurd thought to pop into her mind at a time like this.

And then a more fearful thought pops into your head: "What if this happens again - somewhere else?"

The errant thought popped into her head, and she immediately hated herself for it.

"Oh, and it all fits so well," he said excitedly, as though another thought had just popped into his head.

After a moment, the qualifying thought popped into her mind.

How, pray tell, did the thought even pop into his head?

In the same moment, a thought popped into his mind: Forget that phone.

"The thought popped into my mind on the golf course, when is this all going to end?"