When you purchase through links in our articles, Future and its syndication partners may receive a commission.

Terrifier 3 shocked moviegoers around the world with its brutal murders and simply barbaric finale. But one of the best horror films of the year's final showdown is lightened by a hilarious moment that fans can't get over, which director Damien Leone says was actually improvised.

Warning, the following article contains spoilers for Terrifier 3So be sure to watch the film before reading any further. But before you head to the cinema, read our verdict on the new horror film in our Terrifier 3 review.

At the end of the film, Art the Clown (David Howard Thornton) has the final girl, Sienna (Lauren LaVera), tied to a chair and forces her to watch as he and the demonically possessed Victoria hurt her aunt. But the disturbing scene has fans in theaters laughing out loud, as he repeatedly comically slaps her on the back of the head as he uses medieval torture methods.

But as funny as it may be, Leone says it was completely improvised. “This was something I spontaneously told David on set every time he passed Lauren because I thought the finale was too dark and we needed some levity,” Leone said via Twitter. “I'm glad we have the same twisted sense of humor.” See the full post below.

Well, it looks like this last-minute comic relief worked because fans can't get enough and have been reacting to the scene on Twitter since the film's release on October 11th. “That slap was too funny LMAO,” said one fan, while another added, “My whole theater was screaming when he kept that up.” See more reactions below.

The third installment swaps Art the Clown's usual reign of terror on Halloween night for the holiday season, as the clown dresses up as Santa Claus and once again wreaks havoc across Miles County. In addition to LaVera and Howard Thornton, returning cast members also include Samantha Scaffidi as Victoria and Elliot Fulham as Jonathan Shaw.

Terrifier 3 is in theaters now. For more on Terrifer 3, check out our interviews with the director about including children in the threequel, the importance of fan support and future Terrifer films, or our conversation with star David Howard Thornton about making Art the Clown scarier than ever made and why he wants to play the Joker next. Or stay up to date with the upcoming horror films coming your way this year.