However, what primarily concerned Havelock was the reason behind the doctor's extraordinary behavior.

Come, sit down and tell me what is the cause of this extraordinary behaviour.

It is a deceptively simple looking creature, capable of extraordinary behavior.

Any extraordinary behavior here would certainly alert the guards on the drays.

What excuses do I have for my extraordinary behavior?

Why does extraordinary behavior by the young seem so fascinating?

"This is quite extraordinary atypical behavior for black bears," he said.

Riding back toward the city, Geneva puzzled over her father's extraordinary behavior.

"Now, if you're feeling strong enough, perhaps you can provide an explanation of this extraordinary behavior."

An individual might change social class during a lifetime by extraordinary behavior.