In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair contradict each other. Generated sentences must be short, with less than 15 words. New information can be introduced. Avoid using pronouns to confuse the subject of the sentence.

Sentence 1: A live theater show with five actors on stage doing a choreographed routine. Sentence 2: Actors are practicing choreography.
People are preparing to watch a movie.

Sentence 1: Two men in black clothes inspect the motor of a racing car while the top of the car is lifted. Sentence 2: Two males are standing near a race car.
Two men are going 200 mph inside a race car.

Sentence 1: A man wearing a black shirt, jeans, and skate shoes is jumping near a pond. Sentence 2: The man is jumping.
The man is standing still.