Wrong switch, Daphne!
2 seconds sound clip from Scooby-Doo, Where Are You! - Never Ape an Ape Man (S1E7).
You can hear this line at 00:11:43.501 in the Blu-ray version of the episode.
Quote context
[...]
- Yeah! Talk to him... Dog to beast!
- Whatever you said, Scooby, it's working.
- It's dark at the top of the stairs. He'll get away.
- Turn on some lights, Daphne!
- Oh, dear, which is the right switch?
- Why didn't you put on the brakes, Scooby?
- That puts the stairs back, but I wonder what the other switches do.
- Well, with your luck, Daph, the next button you push will bring the roof down, but go ahead.
- Boy, the Ape Man almost got us.
[...]