I'm definitely on a roll now as I also remember this! Looks like that Baboon is playing 'I'm the King of the Castle!' lol Not sure if it's the same Male, but one used to be sat right at the top waiting for me to come out from work in the late afternoons and then, when he spotted me, he'd run down the 'mountain' making a right racket, with all the others following. This would make people turn and look towards my direction wondering what he'd seen. Me! lol He'd would then pace up and down near the moat and when I approached the island I'd call out his name. This would have him put his head to one side and stick his tongue out at me.
