One critter notices that a cornered human has a gun. The other remarks "So what?'' and is promptly blown to bits. Followed by a (subtitled) Precision F-Strike as the first critter runs away.
Notable in that Siskel and Ebert apparently found it hilarious.
Anything Ug and Lee did while hunting down the Crites in the first movie, from ramming into a church, to throwing a bowling ball at some pins and destroying them.
At the climax of the first movie, the critters escaping the planet in their ship finally notice the firecracker about to explode and all they have to say is "Uh-oh..."
Second film
In the second film when Ugg and Lee massacre the Crites in the restaurant, one of Lee's shots burns off one of the crite's fur on top of its head, it screams in horror then looks at its reflection and admires its bald head and says "bitchin'!" in subtitles.
Lee attempts to transform into a different face from both his prior forms... that being the cutout of Freddy Krueger, which prompts Charlie to beg Lee to not do so. Luckily for Charlie, they just reverts back to their female Playmate form, to which Charlie proceeds to thank the lord there and then.
Fourth film
In the fourth movie, the surviving protagonists have to escape the ship before it explodes. The AI, which thus far has not demonstrated itself as being terribly competent, provides a helpful countdown, only to interrupt the countdown by replying to something said to it. When the computer resumes where it left off on the countdown, the ship promptly explodes with seconds left on the clock. Turns out, talking is not a free action.
