Great scene - indeed it has a little Aardman touch to it. I'm trying to imagine precisely what sound you must have produced to get their attention like that!
I just love the humour that is conveyed to me in this photo.
In fact there are many elements to it that go beyond the brief of the challenge.
I'm reminded of 'Shaun the Sheep' by Aardman Animations, see http:/www.shaunthesheep.com/