When called to add trash to the set, Art Director Joe Cruzaedo-Wagner made sure to include a copy of the script. This is a subtle nod that the writing was garbage.
The passing of Stan Lee put the film on a one day hiatus out of respect and mourning for the Marvel co-creator.
The original costume for Moon Knight was a faithful adaptation from the comics with a the white/silver hood, armor and cape. However the plan was scrapped when test audiences unfamiliar with the comic book mistook the costume for being similar to a KKK Klansman outfit.
A hidden frame of the Art Director Joe Cruzaedo-Wagner can be seen during the black and white insanity scene.
During the fight scene a wooden plank was supposed to be hit across Moon Knight's back. Actor Tim Altevers wore a protective spine and back cover in preparation for the scene, however during one of the takes Thug Micah missed his mark and hit Tim Altevers across his right ribs instead. The impact resulted in multiple welts and bruises for both actors. In the end the scene was used in the final cut.