Okay, so imagine you're playing with a toy car and racing it around. Sometimes, when you turn the car really fast, it starts wobbling back and forth a lot. That's kind of like what happens with an airplane when a pilot makes a mistake.
When a pilot tries to control an airplane, they use different parts of the plane like the wings and the tail to help it move in different directions. But sometimes, if the pilot moves those parts too quickly or too much, the airplane can start wobbling back and forth just like the toy car did.
This wobbling is called a "pilot-induced oscillation." It can be dangerous because it makes it hard for the pilot to control the plane, and can even make the plane crash.
Pilots are taught techniques to help prevent this from happening, like making smoother movements with the airplane's controls. But sometimes, even experienced pilots can accidentally cause a pilot-induced oscillation. That's why it's important for pilots to always be careful and pay attention when flying an airplane.