Motion analysis is like trying to figure out how people or objects move by watching them. It's like trying to figure out how your Barbie dolls walk or your cars drive around. Scientists and athletes watch videos to see how someone is running or moving so they can figure out the best way to do it. They might look at things like how high someone jumps, how fast they run, and how they move their arms and legs in coordination. It's kind of like trying to solve a puzzle or a mystery!