Final answer:
When looking out the window of a moving car, the car serves as your frame of reference to perceive motion. The choice of frame of reference can change the perception of movement.
Step-by-step explanation:
If you back and turn toward the driver's side, you can watch the rear of your vehicle by looking out the side window. When you are looking out the window of a moving car at houses going past and sense that you are moving, your frame of reference is the car itself. If you were to use the houses as your frame of reference, it would seem like you are stationary, and the houses are moving instead. Hence, what you choose as your frame of reference fundamentally alters your perception of motion.