Hey, It's That Guy!: The costumes were designed by Laura Gemser of Emmanuelle fame. That's right: the costumes were made by an actress famous for... not wearing clothes.
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.
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.
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.
Show Within a Show: The movie the guys are watching in the RV is an Italian film called 'Grunt!'