It is mean to make fun of people.
Oliver is asked by his teacher to solve a math problem on the chalkboard for the rest of the class, but he is having difficulty.
The class wants to react to Oliver.
The class is patient while Oliver tries to solve it, and when he fails they quietly listen to the teachers explanation.
The class begins to make jokes and laugh at Oliver's inability to get the equation right.
Oliver is relieved no one insulted him and will have no issues going before the class in the future.
Oliver is embarrassed and no longer has confidence to stand before the class again.