rotting corpse toward the end
I remember being a bit confused about the scene toward the end where Kristy is hiding from Frank and suddenly this rotting corpse pops out of the shadows and dumps a bunch of maggots out of its mouth all over her. I get that it's a jump scare, and an effective one at that, but...where did Mr. Peekaboo Corpse come from? Was it the body of one of Frank's victims from earlier in the movie? Just some random weirdness summoned by the puzzlebox? Is it explained somewhere in the movie and I just missed it? Or is it just a random jumpscare with no context?
Anybody know?