Jules - He knows when he drops a biscuit on the floor

 Jules is looking at me after he has dropped his rusk biscuit onto the floor.

 Then he tries to look down and locates his biscuit.

 Then he points to the biscuit. But I just carried on taking photos of him.

 So he looks up and me and points back at the biscuit again!

And he looks down at the fallen biscuit.