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.)
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.
