I bought a phone with a heat camera and now I know exactly how hot my pizza is

That's a really neat idea for a horror device. You can see evidence of the creature(s) in your walls, but it's very blurry (heat signature spreads out when moving through the drywall), and also delayed (takes time to radiate from warm spots, and also to form new spots).

I'd love to try making a horror game with that angle, but ADHD has me by the balls 😞