Mr Mantis

A very small preying mantis galloped along the top of my gate and slid down the gap between gate and post almost before I could raise the camera. From there it ran up the roof of the letterbox and leaped into the shrub next to it. I wonder what its hurry was?
No time to change settings so this is it.
I hesitated over colour or B&W. The B&W is in the extras - did I make the right choice?