jump scare
US /ˈdʒʌmp sker/
UK /ˈdʒʌmp sker/

1.
a technique used in horror films, video games, or other media to frighten the audience by surprising them with a sudden, loud noise and/or a sudden appearance of a frightening image
:
•
The movie relied too heavily on jump scares instead of building genuine suspense.
•
I hate horror games that only use cheap jump scares.