Here are some of Minecraft`s fun facts:

-Soul Sand has faces in it (probably souls)
-On the debug screen Nether is named Hell and the End is Sky
(probably as it was supposed to be a sky dimension, opposite of the Nether)
-Your attack is more efficient while sprinting or falling
-Iron golems, ocelots, and chickens do not take fall damage
-Iron golems and wolves are the only mobs that can be hostile in peacefull mode
-There is a 0.2 chance for a sheep to spawn pink
-Creepers explode faster when damaged
-Magma cubes, blazes and mobs that are on fire glow in the dark
-Enderman and spider eyes glow in the dark too
-Burning zobies will set you on fire (In 1.5 =D)
-Creepers are a failed pig model
-Skeletons can spawn in the Nether
-Ghasts can`t blow up cobblestone
-Ender Crystal explosion is 50% stronger than TNT
-If you build to the hight limit in Minecraft, and drop an item on top (Q) your game will crash