So let’s say you take a trip to Hawaii and manage to hike out to where the lava meets the sea. Pretty spectacular, particularly at night:
But of course, you hiked there in the dark (likely) over near-black lava (certainly), and now you need to get back to your car, in the dark. Makes for a pretty tough scene unless you brought a flashlight. Luckily, though, most folks remember this little item of equipment (although you’d be surprised how many show up unprepared)
Once you’re back at the trailhead, you can take a long-exposure shot of the folks behind you on the trail:
If you’re having trouble visualizing what’s going on, here’s a VERY STRETCHED shorter exposure shot from the same spot:
Note that all the ground below the horizon is solidified lava flows, the sky is only visible here because I took this on a cloudy night. I’m still amazed at how much detail is visible in this frame…