Throw (one) a curveball American verb phrase mainly US
To surprise someone with an unexpected and difficult-to-handle problem, scenario, or inquiry.
It really threw Mike a curveball when Kim was fired.
John's death threw everyone a curveball. He paid a visit to an orphanage as recently as yesterday.
It threw her a curveball when her husband was arrested for possession of illegal drugs.
To be surprised by some sudden occurrence
To greatly surprise, shock, or confuse someone
The verb "throw" should be conjugated according to its tense.
If someone or something stands/sticks out like a sore thumb, they are so noticeable that the surrounding people and things notice them.
The dress codes of the wedding are blue and green, but Liza wore the red dress - she stuck out like a sore thumb.