It’s rare that a screenwriter would write voiceover copy specifically for a movie trailer. And it’s even rarer that the piece of writing would be something close to the scribe’s heart.

But that’s Jonathan Nolan for you. No one has accused the creator of CBS’ Person of Interest of being conventional.

The topic of writing for a trailer came up after on Reddit user future_room’s posted the 2005 Batman Begins teaser in the Movies community. As Reddit user future_room points out, the trailer was actually created quickly in 2004 to calm the fandom’s fears that it’d be a return to the campiness of ’80s-era Batman.

Another user, 6ft_2inch_bat, praised the trailer’s effectiveness. That’s when Nolan—who co-wrote The Dark Knight and The Dark Knight Rises, two of the three Batman films directed by his older brother, Christopher—entered the thread to drop some behind-the-scenes knowledge:

At at time when movie trailers are being regularly reviewed by publications and on websites devoted to them, you’d think more studios would enlist the creative talent behind the camera in order to come up with compelling teasers. At the very least, it might eliminate the epidemic of trailers that look like they were generated by the same marketing algorithm.