At the end of The First Purge (2018) movie, mercenaries invade Nya's apartment building. But the alarm goes off, it starts ringing and lights keep flashing. What type of alarm goes off when mercenaries invade Nya's apartment building ?

This question: What type of alarm goes off when mercenaries invade Nya's apartment building? The reason was stated that it's a Trivia question, but it's not really. I don't know the answer to it, but I recall the scene and it lends to both realism and understanding the motivation of the charac...

Was the location shown here in the finale of Sherlock Holmes, especially at 0:10 - 0:25, actually a real location? Or was it created with CG in post production? I don't know if it's just because of the way the camera moves around it; but it always looked somewhat...

Early on in Ad Astra, Brad Pitt's character is told "Major, we would like you to send a personal message on Mars by secure laser to what we hope is the Lima Project." Then, he travels to Mars to record a message that will be sent to his dad who's around Neptune. My question is, why did he have t...

A decade ago, I remember watching an eastern or central European movie shot in black and white that featured the following repeating scenes: Some sort of ariel gondola system that transported industrial materials in buckets Lots of rain. Through the whole movie A lot of scenes featuring someone...

Maximus said that I am Maximus and he almost wiped out his planet. Then Ironman said he was Ironman and wiped out Maximus's planet. I have watched that End Game a million times and I still don't get it. Why does Ironman die when he wipes out the planet?

About three years ago, when I first joined, I asked this ID question: Cartoon in which Donald Duck tries to stop another duck from committing suicide. When ID questions were made off-topic in early 2018, the sci-fi ones were all migrated to SciFi.SE, where they're still on-topic, but mine must ha...

In the first episode of Mandalorian, the bounty hunter finds baby Yoda, who is apparently 50 years old. There are also Storm Troopers in the episode. He also says Empire credits are no good. How is this possible when Storm Troopers and the Empire did not exist until the fifth Star Wars movie (2nd...

Why do people keep saying Zac committed suicide in the beginning of the film? I keep watching the first bits and see nothing that would cause this conclusion. Please enlighten me!