What came out of the woods after a group of boys jeered at Elisha?

Answer: Two bears

When boys mocked Elisha as 'baldhead,' he cursed them in the LORD's name, and two female bears came out of the woods and mauled 42 of them.

“Then he turned around, looked at them, and called down a curse on them in the name of the LORD. Suddenly two female bears came out of the woods and mauled forty-two of the boys.”— 2 Kings 2:24 (BSB)