And for a time, those were his last rational thoughts.

After the first few yards, he would already have been going too fast for any rational thought or action.

He held up his hands in an appeal for rational thought.

Among many, fear drove all rational thought out of their mind.

This sort of rational thought certainly makes it easier to plan.

"Plus a moment's rational thought would have given you the answer without asking."

Things are gone far beyond rational thought's ability to predict.

It was one of the last rational thoughts she had for some time.

Some deeper voice, beyond rational thought, was talking to him.

Either he hadn't paid attention in kindergarten or he'd lost all rational thought.