This is a video of the outtakes from Admiral Ackbar's iconic "It's a trap!" scene from Return of the Jedi. As you'll see, they tested several different dialogue options before settling on the one in the movie. Most of the others involved an exchange similar to the following:
"Admiral, something hit me."
"IT'S A SLAP."
Pfft, I've already come up with like a million of these. Including, and virtually limited to, "Admiral, what's that smear?"
Thanks to Nick, who used to bullseye womprats on Tatooine.