I watched a sunset with my friend once. She asked why it was orange, whether oranges were named after sunsets, if I knew what altitude we were at, and whether I'd ever seen a sunset from a plane. By the time she finished her TED talk about atmospheric scattering, the sun had set—so technically she'd solved the problem.

You're halfway through a movie you've been waiting months to see when your friend leans over and whispers, "Wait, why did that guy betray him?" You pause it. You explain the entire backstory. By the time you hit play again, you've forgotten why you cared, and your friend is already asking about the guy's motivation.