- Amateur Cast: Most of the cast were local residents who responded to an open casting call hoping to be extras. George Hardy, who played the father, was a dentist with no prior acting experience who showed up for fun, and Don Packard, who played the store owner, was a mental hospital patient on a day trip.
- Audience Participation: 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".
- Dolled-Up Installment: The movie originally had the more appropriate title Goblins. It was changed to Troll 2 because U.S. distributors were skeptical about the film's chances of success as a standalone film, so they renamed it to its more infamous title to market it as a sequel to Troll, despite the two films having no connection.
- Dueling Movies: With 1988's Hobgoblins.
- Enforced Method Acting: 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.
- Name's the Same: Lampshaded on the RiffTrax: when Diane refers to her husband as "Farmer Waits", Mike Nelson, amused, starts singing "Old MacDonald Had a Farm" in a Tom Waits impression.
- Parody Retcon: Claudio Fragasso has unconvincingly tried to claim that most of film's humor was intentional.
- Prop Recycling: Two masks from this movie were reused in Quest for the Mighty Sword, sequel to The Blade Master. For this reason, it's sometimes released as Troll 3.
- Real-Life Relative: 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).
- Same Content, Different Rating: In the U.S., the film is rated PG-13, but when it was first released in the UK, it was rated 18. Perhaps the MPAA realized that the film wasn't particularly scary. It has since been reissued in the UK at 15.
- Throw It In!: 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.
- Troubled Production: 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.
- Show Within a Show: The movie the guys are watching in the RV is an Italian film called 'Grunt!'
- Vindicated by Cable: Er, depending on your definition of "vindicated", but no one had heard of this film til it hit HBO.
Trivia / Troll 2