One of the most aggravating aspects of recent horrors, say in the last fifteen years or so, has been Jump Scares.
What's that, you might ask? It's essentially where you have something appear behind a character or leap out on screen followed by what's effectively an airhorn-style soundtrack blast. It's a cheap, lazy, unoriginal but ultimately effective way of scaring an audience and it has all the finesse of - you guessed it - an airhorn.
Of course, you're going to jump when you hear it, which is why it's so infuriating to watch - especially in a horror film that hasn't even bothered to try come up with a convincing reason to be scared.
Anyway, this video - originally made back in 2014 - is doing the rounds again and succinctly makes the point of jump scares being totally about sound effects than anything else.
Take a look.