Pop star Will Young will never forget his encounter with a gorilla recently - it threw a rock at him because it thought his girlfriend had a crush on the singer.
The British music star was filming for the BBC Saving Planet Earth series when he visited a gorilla orphanage in Cameroon. All was going one until one of the gorillas erupted into a jealous rage.
He recalls, "One of the gorillas kept making this noise that meant she fancied me.
"It didn't go down too well with the males. One gave me this look out of the corner of his eye, and flung a huge rock against the fence right in front of my face."