Miles Scott is just five years old, but he's already battled leukemia, the Riddler, and the Penguin. The latter two villains were taken on during Miles's day-long adventure as Batkid, where he cruised around San Francisco in a Lamborghini Batcar, saving the city from evil while thousands of people cheered him on.
The day was orchestrated by the Make-a-Wish Foundation, which granted Miles his wish of being Batman (or Batkid, in this case) for a day. While the foundation has granted superhero wishes before, Miles's heartwarming case went viral, capturing the attention of the entire country.
Rescuing a damsel in distress tied to the train tracks, foiling the Riddler (who was attempting to rob a bank vault), apprehending the Penguin during a botched kidnapping of the San Francisco Giants mascot, getting the key to the city--it was all in a day's work for Batkid.
The entire city pitched in to make his day complete. He received the key to the city from the mayor, got a special issue of the San Francisco Chronicle dedicated to the adventures of Batkid, was featured on a TV news report, and even got the Riddler and the Penguin indicted by the Department of Justice. No, really.
It's rare for an entire city to rally around anything like this--it's the kind of thing that will be difficult to replicate. In the end, we have to hope that the Make-a-Wish Foundation got enough donations to make even more pie-in-the-sky dreams come true.