It sounds like you saw the Moon Illusion, a common optical illusion that makes the Moon appear larger when it's close to the horizon. Here's why:

* Our Brain's Trickery: Our brains are wired to perceive objects that are closer to the horizon as larger, even though they're not. This is because we use familiar objects on the ground (trees, buildings, etc.) as reference points, making the Moon seem bigger in comparison.

* Atmospheric Distortion: The Earth's atmosphere can also bend light, making the Moon appear slightly larger and more distorted when it's low in the sky.

The Reality: The Moon's actual size doesn't change, even when it seems to be larger. It's all about how our brains process visual information.

Let me know if you have more questions!