What are some very overlooked or hard to find but nevertheless interesting small features/mechanics that you know currently exists in Minecraft?

I’ll start: Getting damaged from burning (being on fire, not standing in fire or lava) does not reduce armor durability. Apparently neither does fall damage.

Shearing snow golems gives you a pumpkin and reveals their true identity.

If you dye a sheep blue near by an evoker, he will dye it red over and over.

Features/mechanics that you know currently exists in Minecraft?
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