The creeper, one of minecrafts most famous mobs, was it ment to be? Lets find out here!

"The creepers were a mistake" he (Notch) says in the short clip. "I dont have any modeling programs to do the models, I just write them in code. And I accidently made them (the creepers) tall instead of long, so it was like a tall thing with four little feet. And that became the creeper. As oppossed to a pig."

Apparently, Notch had been attempting to create the pig creature type seen within the game, though accidently had the length and height of the animal reversed, resulting in the strange creature that is the creeper. Inspired by the look, he would add the trademark green coloring and tendency to explode to the creature, showing how a small screw-up can result in an iconic monster.

Also seen in the trailer. Exploding arrows, which are so damn cool we can only pray they make their way into the final game. (TNT + Arrow?)