AA battery + staple = fire
Creator Funditor claims right off the bat that this survival tip could save your life. We think that's slightly dramatic, but it shouldn't take away from his video's utility.
The strategy is simple: use the electric charge of the battery and the conductivity of the staple to spark tinder.
So, next time you're lost in the woods (or in a bar looking to light a smoke in a new fashion) try this one out.