‘I’ve Been Impaled.

You might think that improvised lines, where actors make up what they say as they go, happen more in real-life movies. But sometimes, they also happen in animated movies, where everything is drawn or created by computer. In the movie Frozen, there’s a funny moment when the snowman, Olaf, says, “I’m impaled.”
What’s surprising is that this line was made up on the spot by Josh Gad, the actor who gives Olaf his voice. It’s not easy to add improvised lines in animated movies, but this one worked so well that they decided to keep it in the final movie. It shows that spontaneous moments can make animated films even more fun and entertaining.