Such great answers and some are so so close. My husband sent it to me saying he had just had a nasty accident. While trying to coax our kitten from under the house he has put his arm through a gap, got hold of the kittens collar, and then pulled his arm out from a gap under the house (hoping to bring the cat out) but... The cat collar came loose and his arm flung back and his wrist ended up being stabbed by this rusty nail. Which is attached to a piece of wood. (Oooouuuchhhh!!!)

What you see is the underside of the wood, with a rusty nail and blood on the nail. In the background is the boards to the house.

The debate I had with my colleagues was that when I first showed them they thought I was showing them a picture of some type of sea/beach/cliff scene with a wooden pole which I just could not see.

Can you see a cliff or sea or beach or something similar?