HBO Max has shared a short clip from the finale of It: Welcome to Derry, and it has quickly become one of the most talked-about moments from the series. The clip was posted on HBO's official X account and shows a close and chilling look at Pennywise in the final episode. Since it went live, many viewers have reacted to it online, calling it disturbing, scary, and hard to forget. The post has gained strong attention from fans of the show and of the It films.The video clip is taken from the final episode, "Winter Fire," from the first season of HBO Max's prequel show, IT: Welcome to Derry. This last episode shows the concluding battle between Pennywise and the youth from Derry. The video that HBO posted focuses primarily on Pennywise's face as he converses with Marge. The tone of the moment is what many fans say makes it so frightening. The official post can be seen on HBO Max's verified X page.The series It: Welcome to Derry is set many decades before the storyline shown in the It Part 1 and Part 2 movies, but it follows a younger group of children who encounter the same evil that eventually torments the Losers Club in those films. The series ends with the story of these children, but leaves open the possibility that Pennywise may come back again for another round of terror. The promo clip that was released on the HBO Max website gives us a quick glimpse into the essence of this ending, which is what has caught so many fans' attention.The reaction by fans on social media has confirmed that they remember why Pennywise continues to be such a terrifying figure, and they also remember how amazing Bill Skarsgard's performance is, which makes the end of the series where this occurs work so well. The post on the HBO Max website left it to the video to convey the emotion of the clip. This simple approach appears to have helped the video spread faster.Why is this clip from the finale of It: Welcome to Derry getting so much attention?The clip comes at a key point in the finale, during the final moments of Pennywise's return to rest. In the episode, a thick fog covers Derry after the military destroys one of the pillars holding the creature back. Pennywise then leads several children into the storm as the main characters try to stop him. The shared clip does not show action or blood. Instead, it focuses on Pennywise's calm and knowing expression with Marge, talking about his future.This choice is part of why viewers find it unsettling. Horror fans often react more strongly to quiet fear than loud scenes. Pennywise looks aware of more than what is happening in that moment. This matches what the episode later confirms, that he does not experience time as humans do. He knows about events that have not happened yet and exactly how he will meet his end.Director Andy Muschietti has spoken about this idea in interviews. In a conversation with Deadline, he explained that Pennywise sees time in a non-linear way and understands his own future defeat. The clip shared by HBO Max reflects this idea without explaining it out loud, as Marge explains that for Pennywise, the past, present, and future exist simultaneously. View this post on Instagram Instagram PostThe moment also stands out because it links the series directly to the It movies. The last scene of It: Welcome to Derry shows how Pennywise tells Marge that, in the future, her son will help bring an end to Pennywise's life. This means that Marge will eventually have Richie Tozier, who is part of the Losers Club. It seems Pennywise already knows what is coming based on how he looks in the video.Many people have expressed their thoughts about how the video was more of a warning than an ending. Although Pennywise will be asleep for 27 years, many people will remember that he is sleeping and not completely gone yet.How HBO Max is using the clip to keep fans talking about It: Welcome to Derry?HBO Max has often used short clips to keep interest high after a season ends. The clip does not spoil the full ending. This makes it easy to share without ruining the story for new viewers. It shows fear without much context, which invites people to watch the episode to understand more. This approach fits how streaming platforms now promote shows after release.The attention around the clip also connects to talk about a possible second season of It: Welcome to Derry. While HBO has not officially confirmed Season 2, the finale includes a title card that reads "Chapter One." This has led many viewers to believe more seasons are planned. The clip supports this idea by ending on a note that feels open rather than final.Andy Muschietti has said before that It: Welcome to Derry was planned as a multi-season story that moves further back in time. According to his comments to Deadline, future seasons could explore events in 1935 and earlier. The clip's focus on time and memory fits with that plan.For now, It: Welcome to Derry Season 1 is available to stream on HBO Max. The shared clip has become a small but powerful reminder of what made the finale work. It shows that sometimes a single quiet moment can leave a stronger mark than a full scene. As fans continue to talk about it, the clip has done its job by keeping Derry and Pennywise fresh in people's minds.