This actually happened several weeks ago, but I'll post it anyway.
"For a great number of reasons that I don’t want to go into, today was shaping up to be one of the worst days of my life. You know, the kind of day when you just want to lock yourself in your room, turn off your phone, and cry until there’s nothing left in you. One of those days, up until I got on the MAX.
Five stops from home, the train doors slid open and a little girl got on with her family. She couldn’t have been older than six, and was wearing a clearly homemade pink cape and huge pink sunglasses. She sat herself down and proudly informed me that she was a superhero. Figuring I may as well humor her, I asked how the heroics had been going. With a pout, she explained that she’d been looking all day and still hadn’t found any bad guys to fight. I pointed out that if she couldn’t find the bad guys, she could look for the good guys and help them. She agreed enthusiastically, and wrote it down in a little pink notebook with “HERO BOOK” written on the cover in glitter pen. I asked if I could get a picture of her, but she refused- she couldn’t risk anyone knowing her secret identity.
We kept talking for the rest of the ride, and she told me all about her superpowers and how her kitten sidekick was guarding her room at home. As the train rattled into my stop, I thanked her for her conversation and got up to leave. Without warning, she wrapped herself around my leg in a huge hug. I looked down at her in surprise, and she gave the biggest smile I’ve ever seen.
“Hey mister,” she said, “thanks for being one of the good guys.”
Little lady, you may never save the world, but you sure as heck saved my day."