I think I've got that down!
One fine day in the summer of 1994, I made a fire with no matches or lighter. Just the friction of one piece of wood against another. It took a week of practice to coax out that tiny spark, but ultimately my persistence paid off and the spark sparked. It was quite the project!
Some time later, I found myself visiting cordially with a group of friends and aquaintences about various items related to self-sufficiency and self-reliance. "Well, I've seen fire made from scratch," one of the women said. "So I guess I've got that down!"
Turns out my friend had seen an experienced outdoorsman make fire one day. He made it look easy, so she assumed it was. It was a simple mistake. Yet that particular assumption could have cost her her life.