Just saw on reddit a perfect accidental metaphor: jakeredfield posted this in r/gaming:

For the people that have no played Portal yet, be warned, there may be spoilers up ahead for you.

So anyway, I am a huge fan of Portal, I love everything about the game. I bought it upon release and have played through it multiple times. My friends aren't as big of gamers as me so it took them some time to get their hands on Portal. My one friend didn't have a computer capable of running Portal so I let him play on mine.

I pulled up a chair besides him and eagerly watched him play then entire time. He loved the game. I expected him to. It's an awesome game. But here comes the WTF part...(SPOILERS AHEAD)

He go to the part at the last puzzle, right before GlaDOS tries to kill you in the fire. So then, my friend is like, "Oh, so it's one of those games where you die at the end. Haha, it was a good game." And then he immediately shuts it down. I just sat there. Shocked. In awe. I couldn't believe what I just saw. He turns to me and goes, "Good game, I'd play that again."

This is the part where I just hit him and yell, "IT WASN'T OVER YET!" He was so confused. He loaded it back up to that part and couldn't figure it out. I then pointed it out to him what he needed to do from there. He eventually fully finished the game.

Imagine what would have happened if I wasn't there? How many other people do you think only experienced the game up to this part, because they didn't have someone tell them?

What makes it even more perfect is this reply by Aleitheo:

So rather than try to see if he could live or even just die in the fire he turned off the game before he even saw the "ending"?