In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 large vehicle drives through a mud puddle. Sentence 2: A man is driving a truck through a puddle of mud
There is mud outside

Sentence 1: A bare chested man with swimming goggles on his head with a group of swimmers behind him. Sentence 2: a man is leading a swim race
a shirtless man is followed by swimmers

Sentence 1: Olympic swimmers leaving the starting block at the 2012 London Olympics. Sentence 2: The swimmers think the water is too cold.

The swimmers dive in the water.