The film is seldom suspenseful, but the jump-scares are there, and the gross-out images (courtesy of Greg Cannom's makeup) are carefully pushed over-the-top and into the comic stratosphere.
2005, The Magazine of Fantasy & Science Fiction, Volume 109, page 94:
[…] eschews that tried-and-true tactic of horror films, the jump-scare; […]
2012, Xander Bennett, Screenwriting Tips, You Hack: 150 Practical Pointers for Becoming a Better Screenwriter, Focal Press (2012), →ISBN, page 103:
Jump-scares, suspense, and sudden violence are all a major part of the horror genre.