Rambo is usually very loving and fun but today i was cleaning his cage he was upstairs and i was downstairs i have a carpet in his cage and i was on my knees trying to get it out i think he heard me and came running down the stairs started barking i said no in a very firm voice but paid no attention to me he jumped in his cage with basically half of my body in it and started to attack me he was barking growling and biting and bit me hard all over my hands, after i got out he was his old sweet self i know that its his territory but i think him being that aggressive is inexcusable..... have any tips on how to stop this