"The Great Swirling Apparatus of Our Planet's Function", the fourth episode of IT: Welcome to Derry, has fans spooked, but not by the demonic entity. Pennywise appeared physically only twice in the episode. However, the most gruesome and scariest scene in the episode features the character Marge Truman, played by actress Matilda Lawler.The grisly scene is set up in a previous scene as the students, including Marge, are shown a documentary about worms in class. She is especially spooked by a worm with bulging eyes on the screen. As that happens, Patty convinces Marge to fake friendliness with Lilly to play a prank on the latter. However, the prank doesn't go as planned, as Pennywise strikes again.Marge loses an eye in IT: Welcome to Derry Episode 4: View this post on Instagram Instagram PostPatty's prank involves Marge convincing Lilly to speak with a popular boy in the school. The two head to the girls' washroom in the school before Lilly can talk with the boy and Patty can embarrass her again. However, this trap does not play out as Pennywise targets Marge in the third act of this IT: Welcome to Derry episode. A guilty Marge is about to forbid Lilly from falling in Patty's trap, but that's when tragedy strikes.Marge's eyes bulge out like the worm that spooked her in the documentary, and an afraid Marge, who is also in pain, runs out of the washroom in a suspiciously empty school. She enters the school's wood shop and tries to get rid of the bulge by placing her bulged-out eyes using the table saw. She even manages to do so and is about to stab her eye sockets out when Lilly comes in and stops her from doing so.However, at that precise moment, the class walks in, and they believe that Lilly attacked Marge. Therefore, we may see Lilly back at the Juniper Hill Asylum in IT: Welcome to Derry, Episode 5, "Neibolt Street".Matilda Lawler and Andy Muschietti discuss the gruesome IT: Welcome to Derry episode 4 scene:The cast and crew of Welcome to Derry sat down for interviews with several entertainment outlets. One of these was between TV Insider, Marge actress Matilda Lawler, and IT: Welcome to Derry co-creator Andy Muschietti.Lawler teased the impact of the gruesome experience on Marge to the TV Insider reporter:“Marge has a very complicated relationship with herself, and with kind of a sense of belonging. She’s in a place when she’s trying to fit in with a group of people that she doesn’t really fit in with, and she’s kind of trying to change herself, to find herself, which I think is such a common experience that every person can relate to. She’s deeply insecure about so many things, but one of the main things being her glasses. And so it was very fun, especially as a teen girl, being able to kind of scream about it and scream about the insecurities, because It preys on Marge’s insecurities.” The outcome of the experience, though, is that she’s oddly settled by it. “The scare scene with the eyes does have a centering effect on Marge and kind of causes her to reflect on her relationships and see the truth in a way and see that she belongs with her friend Lilly and with the ‘Losers,’ and it’s OK for her to find herself elsewhere, not in the group that you know everyone thinks she should be in.”To this, Andy Muschietti teased that there is a deeper meaning behind Marge's fear and revealed that the reason behind her coke bottle glasses will be revealed only in the final episode:“There’s a specific reason that’s not going to be revealed until the very last episode for which she is wearing the Coke bottle glasses. And so we decided that [her fear] was about the eyes.”The midseason trailer of Welcome to Derry reveals that Marge survived the ordeal, but she lost an eye. But it seems Lilly, Ronnie, Will, and Rich have gained a new ally in Marge.Watch this episode on HBO Max if you haven't already. What did you think about this grisly IT: Welcome to Derry moment?