As part of its Justice League marketing, Warner Bros. has declared it to be The Flash week, and to celebrate AT&T has released a video which features new dialogue between Ben Affleck as Batman and Ezra Miller as The Flash.

Now, if all you know about the Scarlet Speedster so far is that he’s a little…fast, Ezra Miller is here to walk (not run) you through how his take on the big screen hero can’t be missed.

Justice League hits theaters on November 17th.