Here is my entry for the Pumpkin Smackdown 2013 Challenge.
I give you the Mutant Uterus. You will note that the lining grows on the outside as well as the inside. You will also note that it is dangerous, dark and inhospitable. The ramifications of these facts are staggering: it will take some kind of Chuck Norris/Luke Skywalker-grade spawn to make a home in this mother. Ergo, when it does produce children, they will be extremely badass. Bring it.