Prisoners of the Lost Universe (1983)
Two terrified Earthlings are mistakenly transported to the eerie world of Vonya where they must find the hidden Dimensional Door, or perish in the attempt.
A scientist's teleportation device rips a hole in space that leads to another dimension! A bizarre series of accidents sends inventor Dr. Hartmann, beautiful TV reporter Carrie Madison, and martial arts champ Dan through time and into a violent world of swords, warlords and blood-sucking subterranean monsters. Dan's fighting skill's won't be much help after Dr. Hartmann, posing as a wizard, strikes an alliance with Malachi, the barbarian chief, buying his own safety with gifts of powerful "magic" never before seen in this primitive realm - gunpowder and nitroglycerin!
"I'd rather be doing Shakespeare instead of this crap, but I have a house payment due next week."
-Richard Hatch (Star of: Prisoners of the Lost Universe)
Chris Buckey commented
It's been done already.
They've done this one. https://www.rifftrax.com/prisoners-of-the-lost-universe