Not a rolling stone

This moss has gathered on a little stone wall outside our office and was looking very sparkly this morning. 
I was just photographing it (as you do when you're supposed to be inside and working) and along came the postman and did a brilliant little pose on the other side of the wall for me in his postie outfit. Sadly my focus was on the moss. I asked him to do it again and he ran away laughing. 
I'll try to catch him tomorrow.