Miles Scott had leukemia back in 2013 and was given the opportunity by the Make-A-Wish Foundation to fulfill his wish of being Batman (as Batkid) for a day. The entire city of San Francisco participated, closing off roads and setting up action stops as he made his way through “Gotham City” on a quest to save it from The Dark Knight’s Rogues Gallery. One of those stops, you may recall, was at good ol’ AT&T Park. See a recap here:
Batkid went on to complete a tremendous day (he rescued Lou Seal at AT&T Park from The Penguin), memorialized in the documentary Batkid Begins, which you can catch on Netflix right now if you have a subscription.