I have never seen a cat do something like this 

A cat being protective to a baby human and attacking the perpetrator.

Yeah that is something I have never seen before too, yes bizarre, good find Freddy 

Were that to happen to me, P.E.T.A. or no, kitty would be unwillingly joining the space program! {boot!}

Makes me wonder what else Mum has been upto given the room is fitted with a live Camera. 

That is one evil cat!!!!!

I'm with you Dave, that Cooking Fat would soon discover that I, as far as the Feline World is concerned, have a Black Belt in Steel Toe Cap.