Eli Roth wrote the role of Oli for Eythor Gudjonsson after he met him doing press for Cabin Fever in Iceland. Roth was so taken with Eythor's charisma and charm, he promised he'd make put him in a movie one day. Eythor was surprised when he saw that Roth had followed through with his promise, and happily accepted the role.
Oli speaks a little Icelandic in the film. When knocking on the hotel door Oli yells "Djöfulsins" which literally means "devil", but in the context it kind of the Icelandic "fuck", also Oli says the word "snípur" which means "clit". Also when Josh calls Oli and he gets his voice mail which sounded "Hæ, þetta er Óli, legðu inn skilaboð og ég hringi í þig." which translates "Hi, this is Oli, leave a message and I'll call you back". In the subtitles on the DVD the word "snípur" is misspelled as "sneepur" to avoid people confusing it with the english word "sniper".
Eli Roth asked the President of Iceland for an official pardon for making Icelanders look like drunken sex maniacs with the character of Oli. The president laughed and gave Roth the pardon, saying it represented a side of Icelanders not shown in movies. Roth also issued a formal apology to the Icelandic Minister of Culture, for all the damage Hostel may cause to Iceland's reputation.
Eli Roth wanted to have the world premiere of the finished film at the 2005 Iceland Film Festival. During the festival, Roth and Quentin Tarantino were made honorary Vikings at Viking Village, in a ceremony arranged by Eythor Gudjonsson. Roth's Icelandic name is Eli Sheldonsson, and Tarantino's Icelandic name is Quentin Conniesson.
The interior of the slaughterhouse was filmed at a functioning mental hospital in Prague built in 1910, in a wing that had been closed for over 50 years. Building 10, where many of the scenes were filmed, was where the craziest patients were taken. The basement was so creepy that Eli Roth had a string quartet playing classical music to make it feel cozier while shooting.
Eli Roth put nearly every single crew member in the film, including production accountant Mark Bakunas, who appears on a poster in the background of three different scenes for his fictional rock band, 'Bakunas and the Essential Elements.' The other members of the band on the poster are producers Mike Fleiss and Chris Briggs, Co-Producer Daniel S. Frisch, Production and Costume Designer Franco-Giacomo Carbone, and Roth.
When Josh and Paxton return to the Hostel with the girls after the disco, the song in the background is "How Do" by the Sneaker Pimps, a remake of the song Willow sings to seduce Sergeant Howie in The Wicker Man, which is also a film about townspeople conspiring against an outsider.
When Paxton, Josh and Oli first arrive at the Slovakian hostel, the hostel personnel are watching a movie on TV. This movie is Quentin Tarantino's Pulp Fiction. (Tarantino was a producer for "Hostel".)
Milda Jedi Havlas:
the movie's production assistant can be seen as the male desk clerk at the Slovakian hostel. He played the part to replace an actor who dropped out shortly before his scenes were to be filmed.
[youthful and culture clash]
The kids in Cabin Fever and both "Hostel" films all leave their home environments to go somewhere they can behave irresponsibly with no repercussions. This behavior ultimately leads to their demise. Another trademark of Roth's is culture clash. In "Cabin Fever" it's suburban vs. rural, in the "Hostel" films it's West and East.
The trivia items below may give away important plot points.
The trailers bill the movie as "inspired by true events". Director Eli Roth says that he found a Thai website that advertised itself as a "murder vacation," offering users the chance to torture and kill someone for the price of $10,000. According to the story, videos of a random person walking into a room and shooting someone in the head were posted on the Internet. Roth later showed the site to Quentin Tarantino and the two developed the idea for the film. Tarantino and Roth said later on an Icelandic talk show that they have no idea if the website was real or not.
The original ending in the script ended with Paxton kidnapping the Dutch Businessman's daughter, then as they leave on a train he covers her mouth to prevent her from screaming (it's unclear whether or not he is helping her or if he is going to hurt her). This ambiguous ending was changed for the film because test screenings thought the ending was too dark and not satisfying enough. Eli Roth then re-shot the ending that made it into the final cut (Paxton killing the Dutch Businessman). The alternate ending will be on the DVD.
When Paxton is in the slaughterhouse with the German, he delivers a speech in German. He is saying, "If you kill me, it'll destroy your life. Every time you close your eyes, you'll see me. I'll be in your nightmares every night, your whole life. I will ruin it."
Eli Roth initially wanted to do a documentary on the subject of the "murder vacation". However, as he was doing research, he found it almost impossible to get into contact with people involved in such business, and that he could put himself in danger for asking around. He decided to use the subject for a fiction, instead.
After Josh (Derek Richardson) has his Achilles' tendon sliced, much of his screaming is real. While writhing in pain, the actor accidentally pulled the chair up and brought it down on his foot, nearly splitting his toe in half.
The crate that Paxton hides behind at the train station had to be painted over, because the production design team put the words "Made in Slovakia" on it. Eli Roth thought it would seem strange for a Slovakian crate to have English words on it.
Although many people are murdered at the slaughterhouse, none of these killings are fully viewed on-screen - the film cuts away right before the Dutch Businessman murders Josh, we see Oli has been decapitated, Paxton sees numerous dead bodies, etc. On the other hand, the movie shows every killing committed by Paxton from the time when he shoots the German Surgeon to death (includes the bodyguard, the butcher, the American Businessman, running over the three people who were paid to turn him over to Elite Hunting, and finally the Dutch Businessman).
Eli Roth said that the scenes set in the Amsterdam brothel and the slaughterhouse when Paxton sees various people being tortured paralleled each other, with the former being an extreme view of sex and the latter an extreme view of violence.
It took a few hours to fully apply Jennifer Lim's "burned face/dangling eye make-up". The make-up was so realistic that when she looked at herself in a mirror for the first time after it was applied, she began to cry. She said that she would understand why her character would commit suicide after seeing the effects of the torture done up on her.
At the very first screening of this film at the 2005 Toronto Film Festival, two ambulances were called due to people having such extreme reactions to the film. A man left the theater during Josh's torture, fainted, and tumbled down the escalator, a woman asked for paramedics, believing she was having a heart attack during Paxton's torture scene. Both patrons were okay, and local media thought it was a publicity stunt by director Eli Roth. However, Roth claims to know nothing of the incidents, as he was in the theater watching the film, and only found out after when he was told by the festival staff of the chaos that transpired.