Took a wilderness class once. We stopped for the night. Everyone set up camp and as typical have their crap spread out all over the place. Shovels leaning up on trees, knives stuck in whatever, Nalgene bottles sitting around - generally what one would see in an typical undisiplined camp.
Next mid- morning after breakfast instructor said lets go for a hike to look the area over and to learn plants etc. fortunately I'm like wildmike I don't leave critical gear behind. Most everyone else did because they assumed we be back in camp in a few hours. About 2 oclock the Instructor tapped a student on the shoulder and said you've now got an injury and we can't get you back to camp before we run out of light! No headlamps, no matches, no first aid, food, water, shelter etc!!
So the whining and sniveling began and we made the best of a miserable night - except one or two of us brought along our critical gear and was able to make the best of it. Honestly I fared well. Some curled up under the base of a tree and whined.
We divided up into pairs/threes and one had to simulate being seriously injured. My injured buddy and I had fire, a shelter, water, some food, a cheesy cheap space blanket, and my headlamp so my injured buddy and did ok. I learned from the experience but others learn more and more painfully. Figure out a way to keep a knife on your person all the time!