My cats still go through crazy cat moments...even my 9 year old. They arch their backs and hop around sideways on their toes with airplane ears and bug eyes. I can't tell when Dixie and Churchy puff up but when Toby does, he has a ridge down his back and his tail gets like he stuck a paw in a socket, lol.

They'll go after everything from the dog to invisible ghosties and sun fairies, lol.

Normalcy is all relative anyway and it sounds like Puffkin is right up their with the rest of the "normal" cats.