Note that Dark Castle was programmed by Jonathan Gay, who would eventually go on to make FutureSplash. You might know it better from what it was renamed to: Flash (of Macromedia/Adobe).
The first time Marc Canter (who founded Macromedia) introduced me to Jonathan Gay at CGDC as the creator of Dark Castle, I excitedly and respectfully held and flapped my hands above my head and shouted at him: "Nya nya nya nya nya! Yow! Uuuurh! Yeah! Yeah! Yeah!" (The sound of the nasty monsters, and picking up rocks.)
https://youtu.be/6U6v3XyrPLc?t=43
For years after playing that game, I would always say "Yeah!" whenever I picked up a rock, and I'd always look for bats every time I entered a room.
After my friend and I (whose Mac we both relentlessly played Dark Castle on) went to pick up a big chunk of hash from his pot dealer, we both looked at each other and said "Yeah!" Fortunately we refrained from throwing it at a bat.
Someone claiming to be the creator of Dark Castle says they are working on a 40th anniversary edition in the comments of that video.
Another commenter figured out how to spell "Woah! Wueeeueehh, wueeeueehh, wueeeueehh! Mmmbrbrbrbr!"
Was the dual “euh weuuu heu heuuu” when you were drunk or when you fell from a a bit too high?
The latter. There's only one heavy drinker in Dark Castle, and it's not the hero. ;-)
Wow, thanks for that lesson! I owe that guy my career.