Random bug and my character became stuck in Werewolf form, enjoy your meal in Whiterun!
I tested this over 14th minutes and my character still a Werewolf.
This bug appears when I entered in the Hob's fall cave as a Werewolf.

Install
Copy the save in your Skyrim's save folder, usually "C:\Users\%username%\Documents\MyGames\Skyrim\" with Windows 7.
Load the save called InfiniteWerewolf.

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Thanks for the comments