1
One thing you should also notice is that Lewis's rage is focused, yet blind. Think of it as Lewis controlling everything in the mansion. I mean, he did create it and all. He's aiming it at Arthur (focused), but he is unintentionally putting his other friends in danger as well (blind). The sword swing at 1:06 could have killed his other two friends, although it was aimed at Arthur and same with the explosion at the end.