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 little boy is jumping into the kiddie pool in the backyard. Sentence 2: A boy is playing in the pool.
A boy is playing in the sandbox.

Sentence 1: A man is cutting food on a watercraft at the dock as six pelicans float nearby in the water. Sentence 2: A man on a watercraft at the dock is cutting food as six pelicans float nearby.
A man is eating food, on a watercraft as peilicans float nearby.

Sentence 1: A man in a yellow sweater catching a Frisbee. Sentence 2: A brightly dressed man catching a frisbee.

A man catching a grenade thrown at him.