AT&T Park has seen its share of batboys. Friday was different, with “Batkid’s” dramatic appearance. Batkid, aka 5-year-old Miles Scott, performed a series of daring feats throughout the city, fulfilling his desire to be a superhero. The Giants became involved in Batkid’s saga as he dashed into their ballpark to rescue Lou Seal, the club’s mascot, from the dastardly clutches of the Penguin.