Alan Padziński, a professional instructor and sword performer from Poland, has (like me) been playing too much Witcher 3. Instead of endlessly writing about it on a website, though, he’s hit the woods and started working through his addiction with swords.
This video shows how to do Geralt’s special fast attack move, the “whirl”. Note that this is training for fun, not training for combat: The Witcher 3 is not real, you’re not a monster-slaying mutant, and this definitely isn’t how people actually fight with swords.
An interesting read via Kotaku