What jokes have a turning point in the ending?

One day, Little Bear asked his mother, Mom, what is happiness? Mother bear said, son, just ask around in the forest. So the bear went to the forest by himself and asked them everywhere what happiness was. But rabbit, fox, monkey, tiger and lion said they didn't know. But the bear still won't give up. He went round and round in the forest, but he still didn't know what happiness was. At night, the bear is tired and hungry. He decided to go home. When he got home, he found the house full of delicious food. Bear was very moved, but he still wanted to know what happiness was, so he asked his mother. Mother bear touched her head lovingly and said, the greatest happiness is that Xiong Haizi is not at home for a day.