jump scare

Noun

 * 1)  The technique, typically used in horror films and video games, of having something occur suddenly and without warning to frighten the audience.

Translations

 * Finnish: säikäytys
 * French:
 * Russian:
 * Spanish: susto repentino

Verb

 * 1)  To frighten (a film audience or video game player, etc.) by means of something that happens suddenly without warning.

Etymology
From.