I've photographed razor wire a few times over the years and when I come across a fresh string of this devilish stuff I usually examine it for a shot. This razor wire was defending the yard at the back of a building. Its photographic appeal didn't become really apparent until I zoomed into the coils and the out of focus sunlit building behind added its complementary yellowish to the bluish elsewhere.
photo © T. Boughen Camera: Lumix FZ1000 2