There might be an actual official name for it, but it’s what I refer to simply having a decent compact point in shoot camera with you (which can easily fit in your pocket) at all times. Having a camera always with you can lend itself to being in the right place at the right time for either a natural event (i.e. sunset, rainbow, great lighting, etc.) or some other human / group activity which converges at once.
Below are a series of photos take simply because I stopped my car on the way out of Ophir (on the Way to the Telluride Bluegrass Festival) and took a few shots of the mountainside during the sunset hours. I guess I’m going to have to figure out the precise names of the slide path picture in the photo. I believe it’s either Magnolia or Colorado.