* AudienceParticipation: During the viewings of the movie, the audience would throw popcorn and bologna slices, as well as counting down to when Joshua "pisses on hospitality".
** At B-Fest 2010, the ''entire room'' joined in on the "Oh my goooooooooooood".
* DolledUpInstallment: The movie originally had the more appropriate title ''Goblins''.
* DuelingMovies: With 1988's ''Film/{{Hobgoblins}}''.
* EnforcedMethodActing: The drug store owner looks genuinely insane and maniacal, because the "actor" Don Packard was a patient at a mental institution during filming and stumbled onto the set while on a day pass. Not surprisingly, he gives the best, most convincing performance.
* NamesTheSame: Lampshaded on the Podcast/RiffTrax: when Diane refers to her husband as "Farmer Waits", Mike Nelson, amused, starts singing "Old [=MacDonald=] Had a Farm" in a Music/TomWaits impression.
* ParodyRetcon: Claudio Fragasso has unconvincingly tried to claim that most of film's humor was intentional.
* PropRecycling: Two masks from this movie were reused in ''Quest for the Mighty Sword'', sequel to ''Film/TheBladeMaster''. For this reason, it's sometimes released as ''Troll 3''.
* RealLifeRelative: The young son of the Presents (the Nilbog family who were doing the house exchange with the Waits) was played by Gavin Reed, son of Deborah Reed (Creedence).
* ThrowItIn: In the original script, Joshua stops the family from eating the corrupted food by making a scene, namely, by jumping on a chair and yelling he's possessed. The day the scene was shot, Claudio Fragasso (the director) turned to the boy playing Joshua and told him, "Possessed, boring, bullshit. You piss on the table." A legend was born.
* TroubledProduction: Actually an efficiently-produced film, made for around $200,000 and finished in three weeks. But the cast was made up of Utah locals, many of whom had no professional acting experience (and who assumed the casting call was supposed to be for extras). To make matters worse, only one member of the all-Italian crew spoke fluent English, and the cast were only given the script a few pages at a time, and very minimal and confusing direction. And the director wouldn't allow the actors to change the awkwardly-phrased dialogue, leaving the actors even more in the dark about what was happening. It all added up to a glorious trainwreck of a film.
* ShowWithinAShow: The movie the guys are watching in the RV is an Italian film called 'Grunt!'
* VindicatedByCable: Er, depending on your definition of "vindicated", but no one had heard of this film til it hit {{HBO}}.