I'm waiting in a line of cars that's a mile long. They inch forward slowly. By the time I reach the intersection, cars are whizzing through and making turns so quickly that if I were to attempt to cross, I'd get hit. My car would be pulverized, and I would surely sustain injuries that will affect me for the rest of my life. Or I'll die.

The cars pass through the intersection for an eternity.

But what if the cars going through the intersection aren't real? What if it's all in my head? What if I can go through the intersection now and not get hurt?

But I don't know.