Scooby Doo and the gang split up and search for clues on the theater stage. During their search, the Phantom Puppeteer tries to drop different objects on Shaggy and Velma. This clip gives hints as to intention of the Phantom Puppeteer and the perilous nature of the theater in which the gang is situated, despite the Puppeteer not talking at all.
The minions participate in a contest to see who can cover the most distance away from the main platform. We don't understand what the minions are saying, but we can infer from their actions that they are participating in such a contest.
Sully and Boo sneak around the office in an attempt to find Mike. During their search, Boo uncovers an underground passage, which they follow to find Mike and Randall. Randall is trying to get information from Mike on Boo's whereabouts, so he starts up the Scream Extractor and shows his intentions to use it on Mike. Although it's not clear what the scream extractor does exactly, based on hints from the scene and Mike's reaction, we can determine that it is not used for something positive.