The squirrel had cracked open an conker and and was nibbling away at it, it's tail going ten to the dozen.
It is heavily cropped and through a glass door as each time I opened the door it scampered further away from me.

It's not a great image, but I have never stopped since I finished work and to be honest I was glad I saw this squirrel, as goodness knows what I was going to blip!