The final shot
What was the deal there? After surveying the carnage with a montage of the dead characters, the camera just suddenly starts moving around erratically as if it were the POV of someone nervously checking their surroundings, and then the monster bursts out from behind some hanging cloth and comes straight at the camera for a final scare.
Was that all just an excuse to have one last cheap jump scare? It felt like the movie suddenly turned "found footage" for 20 seconds.