There are many different techniques and ways of creating a selective color images in Photoshop, let me show you the one where we use the black & white adjustment layer.
Adding a lens flare can make or break a certain image. The best kind of lens flare is the natural one taken through the actual lens of a camera, but if we do it the right way, we can recreate it using Photoshop just as good.
Remember the legendary Predator movie with Arnold Schwarzenegger? Those Predator aliens had this thermal view feature so they could their prey even in complete darkness, let's Photoshop it.