Virgil LOVES to get brushed

Virgil got pretty jealouse the other day when I was brushing my cat...he wanted to be brushed too. So I started brushing him. He was sooooooo happy. Purring and everything. I was like wow. Then he wants to go on my shoulder when I'm brushing him. He gets really lovey dovey. So I hold him for a few seconds... then it is like a switch flips in his head. He starts to hiss. So I usually put him down gently and he is grumbling. Well, last night I decided not to put him down. He started to freak out a little bit, and tried to bite my head. I put him down and told him that is a bad kitty and he was grumbling and had his paw up and ready to smack me...so i put my hand out too. He was confused. He didn't think I'd fight back. He hissed, I hissed...he rolled on his back and was mumbling. Tux proceeded to run around the house to get a front seat view of our cat fight. It was HILARIOUS....he was looking at me like go go go go. Then Virgil calmed down and I walked away. Within a few minutes he was at my feet. Wanting attention. I still don't understand this cat haha.