After the completion of The Elder Scrolls V: Skyrim, everyone got together after and was given a week-long period to “do whatever they wanted.” As such, you can see some of the totally awesome ideas that the people at Bethesda have.

Note that these things are completely experimental and most (if not all) will never be released to the public. They may come to the players as DLC, but there is no word for sure.

GIANT ENEMY CRAB, SON!