There is a leaf growing out of the sun! You fly out into space to check it out and when you get closer you see that it isn't just one leaf, it's a hundred! That makes sense, you wouldn't be able to see just one leaf on the sun from where you were on earth.
You fly closer, counting all one hundred leaves when you hear a strange sound. You take off your space helmet and hear, "GUH HYUCK (ひゃく)!" You know that laugh... it's Goofy! On top of the hundredth leaf is Goofy laughing and waving around. He must have built this leaf tower to get your attention.