I'm generally not a fan of movie mashup videos, but this one's interesting: a score swap between Alfred Hitchcock's “Psycho” and David Robert Mitchell's 2015 box-office sleeper “It Follows.” I found the “Psycho” portion the most successful, with Disasterpeace's pummeling, synth-driven scare theme transforming the film's famous shower scene into something altogether more gut-churning.
It's a fascinating experiment that demonstrates how different music can completely change the feel of a classic film — all the more apparent in this case, with Bernard Herrmann's screeching strings being arguably the most crucial element of Hitchcock's most endlessly-analyzed scene.
[House by the Video Store via Consequence of Sound]
(The shower scene portion comes about 3:00 in.)