Fig Birds Sounding like King Parrots

Today at work I heard what I though was a King Parrot - The single whistle they make.

Then I heard the sound they often make when flying.

I went outside, looked in the tree and to my surprise there was a Fig Bird making the noises.

He would then go onto Fig Bird calls then randomly throw in King Parrot calls.

Has anyone else heard them do that.

And no there wasn't a King Parrot in the tree or nearby, I actually watched him change calls.