There was an episode of Law and Order: SVU where this little girl got raped and murdered outside of her foster home, and they suspected her foster brother of doing it. The first time you see him he's playing on his computer and you hear a very distinct da-da-daddle-dee-daddle-da-deee and you know right then and there he definitely did it

I heard the undead sound on there a couple of times. i.e. in the tower of frozen shadow, if you're near one of the ghosts. No idea what it really says, but something similar to 'chicken chicken slide..'.

On a starburst commerical a few years ago I heard a buff completion sound.

Maybe sony sold some audio assets or something?

Heard the Ding sound in Scooby Doo Episodes.

I've experienced this sort of thing as well, but in my case it was the sound of the little baby mushrooms in Dark Souls on a commercial or something. I heard it from across the house and since I was playing Dark Souls religiously I recognized it immediately. It was a loon sound that they used for the mushrooms. But it was the exact sound file.

I hear EQ bear noises all the damn time. At least, I heard them first on EQ. I think.

The gator sounds from UO are used heavily on the Gator Boys TV show. I LOL every time I hear it.

?

I remember one day my kids were watching some Christmas show. I can't recall if it was a cartoon or one of the stop motion shows but one of the characters cast some spell and when it took effect it made the very familiar and much loved EQ level up ding and I almost jumped out of my chair.
I believe the sounds are all stock sounds which production companies use. Usually there's a minimal license fee or none if a public domain type thing because I've heard many EQ sounds in the oddest of places on shows..
It's pretty cool to hear and have that wave of nostalgia wash over you..

There is a matching game (card matching) on the Nabi which has the rat sound effect (the one they make when they are hit).

I also heard the ding noise on Jake and the Neverland Pirates (Disney show)

The old nickelodeon game show, "Figure it out," used the quest jingle in every episode.

South Park takes jingles from Heroes of Might and Magic III all the time.

Shit's just stock.