Movies come in a variety of shapes and sizes. Not every film has to be a mainstream blockbuster, and not every film has to be an arthouse drama that only a few people will appreciate. Whatever the genre, determining whether a film is good, bad, or in the middle should be simple. At best, the film is Oscar-worthy; at worst, it "wins big" at the Razzies.

But then there are those films that are difficult to categorise in terms of quality, which means that they are unquestionably bad but are so fascinating in how awful they appear that we are drawn to them despite our better judgement. There have been many such films of particularly enthralling atrocity that everyone can't stop watching.

Reefer Madness (1936)

Reefer Madness is more of a 68-minute PSA about the alleged dangers of marijuana use than a feature film. Like how smoking the devil's weed will make you insane, and aggressive, have hallucinations, and then accidentally shoot someone before framing another person for the murder. (This is exactly what happens in the film) From the opening credits to the laughable final line, the 1936 propaganda film drips with absurdity but is told with straight-faced, stern sincerity. The film is now in the public domain, so you can watch it on YouTube. Of course, the best viewing experience is with a couple buds.

Plan 9 from Outer Space (1959)

Plan 9 from Outer Space is not Ed Wood's first or worst film, but it is by far his most enjoyable. Don't get us wrong: the sci-fi film isn't Wood's worst, but it's still awful. Aside from continuity issues, "Plan 9 from Outer Space" has poorly written dialogue and narration, actors clearly reading from scripts, awkward stock footage placement, lazy costumes, and visible sound equipment. It's every bit as amusing and entertaining as it sounds.

Mommie Dearest (1981)

Mommy Dearest, a docudrama, is so unintentionally funny that the studio changed the advertising campaign midway through to capitalise on the camp value. The script was bizarre to begin with, but it's Faye Dunaway's outrageous portrayal of actress Joan Crawford (including the famous "wire hanger scene") that propels "Mommy Dearest" into the so-bad-it's-good territory. According to reports, Dunaway was so invested in the role that the cast and crew were hesitant to approach her between (or even during) takes.

Vegas Vacation (1997)

Many people have fond memories of the National Lampoon franchise. Chevy Chase and Beverly D'Angely are film staples and two of the film's driving factors, along with a tight script and pacing.

However, it appears that all of these things were thrown out the window with Vegas Vacation, as agreed upon by not only the general audience but also film reviews and critics.

The lovable Griswolds return for yet another vacation in Vegas Vacation. As the title suggests, they're off to the gambling Mecca of Las Vegas on this trip. As is customary, the entire gang has mishaps and misadventures.

The film's opening is strong, but it quickly fades, with the running gag of Clark losing a lot of money at blackjack and losing steam much faster than the film hoped. You don’t have to be a master at understanding slot machines to see how unspectacular this film is.

Troll 2 (1990)

The film, marketed as a sequel to Troll (1986), focuses on the Waits family and some teenagers as they are preyed upon by vegetarian goblins (NOT trolls) who want to turn them into plants so that they can be eaten.

If it wasn't clear already, this film is a shambles. To name a few aspects, every performance, every word spoken, and every plot point is overwhelmingly cheap and hammy, but those qualities are precisely why Troll 2 is adored. At the very least, the world is grateful to the film for giving it the "Oh my God!" meme.

Samurai Cop (1991)

When a rogue Yakuza faction known as the Katana expands its operations by violently taking over the Los Angeles drug trade, the LAPD enlists the help of Joe Marshall (Matt Hannon), a cop who claims to be well-versed in Japanese culture, including the use of the sword. Joe is the only man who can take on the Katana when he isn't picking up loose nurses while his partner watches with amusement.

Where do I even start with this one? Samurai Cop exemplifies amateur filmmaking at its most entertainingly abysmal, from acting to writing to camera work and editing. The only thing it did right provided an excellent choice for a movie night with friends who are tired of complex dramas and big-budget spectacles.