The amazing world of gumball: The depression

It was a normal day. Gumball and Darwin were going to school by the school bus.

When they reach school, they are shocked to find the classroom door locked, with all the children inside. They go to complain to principal Brown, but he is not in the office either. Then, suddenly, Darwin runs away. Gumball, left with no choice, runs behind Darwin. Darwin and Gumball try to open the door. Gumball brings a hammer and smashes it on the door. The door is opened and everyone comes out, including Mr.brown. Gumball and Darwin ask Brown who locked the door, Mr. Brown replied with an eerie voice, "MISS SIMIAN".