Had an interesting experience a few years ago. Me and some friends visited another friend that had a parrot. * When we came the parrot said hello to everyon

Had an interesting experience a few years ago. Me and some friends visited another friend that had a parrot. * When we came the parrot said hello to everyone. * One of my friends aggravated the parrot by standing on the far side of the cage and making funny faces. * When we left the parrot said bye to everyone but him. * When we came back a couple of weeks later and he had forgotten about the parrot and came too close to the cage it tried to bite him. Would hardly have believed it if I hadn't been there on both occasions.