Things you didn't notice before in Mario games

During some of the in-between world cutscenes in 3D Land some of the hills have eyes.

This surprised me since I thought they were basically gone from modern Mario and they don't seem to appear in any of the actual levels.
 
The walls have eyes everywhere, watching your every move. You might not see them now, but they're here. And just when you think you're safe, you are being spied on.
 
The girls' biker outfits have heels.
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That's why they're the same height in their biker outfits as they are in their dresses and heels.
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58px-DaisyBikeAwards1.gif
 
If you solve Ms. Mowz's trouble, she will let you keep the badge you got for her (it's initially treated as an important item). However if your badge inventory is full, she will acknowledge this and jump offscreen towards the shop, then return and say she's left it at the shop for you to pick up later.
 
I wasn't either, until I used a randomizer hack that turns every badge, item, Star Piece, Shine Sprite or coin into a random entity that can be any badge, item, Star Piece, Shine Sprite (these seem pretty rare though, I'm now in chapter 5 and haven't gotten a single one) or even a Crystal Star (which is useless since everything tied to them is scripted in the story). Thus, enemies that drop many coins suddenly drop many other things that include badges, by chapter 4 I hit the badge limit and had to start tossing them (thankfully, there were many Double Pains and Slow Gos and the like I could toss)

Also some of the Crystal Stars you get at the end of the chapter (except Chapter 2 for some reason) is a random badge or item, though it still counts as clearing the chapter and you get the special move. It just looks weird seeing random stuff spinning around Mario.