Boy, does Shyamalan have a cameo in Glass! Fairly early on, we learn that David and his son are running a security goods shop together, and our fair director comes in to buy a security camera for his building, remarking on his "spooked tenants." David wants to "go for a walk" (aka fight crime), and his son keeps telling him not to. "Let the man go for a walk," Shyamalan's character says, "jeez."
I find this one especially cringe-y, especially because the cameo seems to be a wink at the final twist in the film, which involves security cameras. It's like a slap across the face.