expression
what's gotten into you?; what's the occasion?
Used when someone acts out of character or does something unexpected, often with a tone of surprise or mild suspicion. Literally 'what wind is blowing?'.
今日はどういう風の吹き回しか、彼が自分から掃除を始めた。
What's gotten into him today? He started cleaning on his own.
どういう風の吹き回しか、部長が急に優しくなった。
I wonder what's come over the boss; he suddenly became nice.