See that pulley? The net's connected to the rope, the rope runs down to the reel, and the reel is wired to that dark switch box, which you will pull to release the net.
9 seconds sound clip from Scooby-Doo, Where Are You! - Never Ape an Ape Man (S1E7).
You can hear this line at 00:12:53.798 in the Blu-ray version of the episode.
Quote context
[...]
- Boy, the Ape Man almost got us.
- Well, I found the perfect trap for the Ape Man. Come on.
- Now, then, this is the basement where the last scenes of the movie are to be shot.
- Look up there on the ceiling. That net was put up there to capture the Ape Man in the film.
- And we can use it to capture the real Ape Man.
- Great! How do you know it will work?
- And look... Under the net there's an X on the floor where the Ape Man should be when the net falls.
- But how are we going to get him to stand there?
- Yeah, but how are you going to get the Ape Man down in the basement?
- Hmm...
- Scooby, will you do it for a few Scooby Snacks?
- Hmm...
[...]