I used to house sit for a friend who had a grey.
He'd make the electronic sound that their burglar alarm made to let you know a door had been opened. Then he'd call the dog in the owners voice. "Hey bud! I'm home! "
Then he'd wait for the dog to come barreling in the room.
Then he'd laugh like a crazy person in a scary movie and mutter "fooled ya" about twenty times.
He was amazing.
Ok, that is seriously funny!! A bird that speaks Bird, Dog, English, uses humor (correctly & for their own amusement), and understands the concept of protection/deterrance....scary smart! I love it!!