This story discusses plot developments in “Superman,” which is now available to purchase on digital VOD. James Gunn provided a rare and fascinating look inside the process of making “Superman” on Friday,

Edited together as part of a 60-minute making-of feature, the seven-minute video shows Gunn walking Corenswet through Superman’s big final confrontation with Nicholas Hoult’s Lex Luthor, and specifically the moment when the Man Of Steel reminds Luthor he’s just as human as the rest of us.

The Twisters actor was one of the first people to audition for the role of Clark Kent/Superman, which meant that Gunn had his star early, but he continued to see actors. According to GQ, there were about 400 people the director saw after Corenswet, who had no idea they were competing with him for the part. Gunn said…