How to make a jumpscare

I am creating a horror game called “The Child.” How can I make it so that when the entity gets close enough to the player / camera, a death screen or jumpscare will occur?

The easiest way I can think of would be to set up your jumpscare scene somewhere in the same Scene but out of view of the main camera, if you have room. Give the jumpscare its own camera and switch to that camera when you want to startle the player.