Funny thing in movies that I can't seem to find.

[Inyarear]

Well, the alien-hunting crazies in Spaced Invaders did something like that in one scene, as noted in our esteemed moderator's review of that movie:

--53 mins - Humans: 1, Martians: 0, Cats: -1

I also recall a Saturday Night Live Skit where a table full of mobsters were dumping on each other in various ways; the guy on the lowest end of the pecking order, since he can't dump on anyone else, first throws his fork at a cat offscreen, and then pulls his pistol and fires at it.

[Flangepart]

Ya want cat yowles?
MONTY PYTHON AND THE HOLY GRAIL!
More cat abuse then any other flick.

[peter johnson]

Aw, shoot -- everyone named the ones I would've named . . .
I guess it's sort of on-topic, but the first use of a HUMAN scream that appears to start onscreen, but morphs into that of the air-brakes of a bus pulling up in the next scene, something we've seen alot since then, was Val Lewton's "Cat People"(1931).
Marty Feldman used the gag often in his "Marty Feldman's Comedy Machine" TV show in the late '60's, so maybe that's what inspired Mel to use it in Young Frankenstein -- I really don't know . . .
peter huh?/denny cat scream

[ghouck]

Lol, seems like it's everywhere, or at least everywhere I'm interested. I watch alot of Mel Brooks, Monty Python, and catoons. I have never watched duckman though, I'll have to check it out. Funny how, as one person said, they do it almost every episode. Just like on MXC, there's ALWAYS someone with the name "Bobaganush". Sealab 2021, one of my favortie cartoons, does that alot: Takes a line of an object that is part of one episode, and cram it in somewhere else, weather it fits or not.

[Inyarear]

It kind of happens in the Steve Martin comedy The Man With Two Brains.  Dr. Steve is performing brain surgery on some schmoe, and then says "will someone get that cat out of here!", which is followed by cat screeching.

"Scalpel... Forceps... Retractors... Get that cat out of here..."

"Mreow!"

[Automan2000]

It was used in Orgazmo when Chodaboy fired the cock-rocket.

[BoyScoutKevin]

This actually happens twice in "Underdog," which I actually liked more than I thought I would

There is one instance earlier in the film, than there is this one.

Underdog and Polly Purebreed go on a dinner date at the top of this building, and they are eating spaghetti, ala Lady and the Tramp, and they are down to the last meatball, and it is "You eat it." "No, you eat it." "No, you eat it." And somewere between "No, you eat it" and "No, you eat it," the meatball rolls off the plate, falls off the building, and hits the ground. And you hear this cat yowl, as the meatball hits it.

[ghouck]

I heard it in Mr. and Mrs. Smith also .  .