premise: Kevin falls<br>Kevin is at a theme park. He goes on the big roller coaster. He is having a great time. The roller coaster goes upside down. Kevin falls out and injures himself badly.
hypothesis: Kevin was having a bad time until he fell out of the roller coaster, then he was having a great time.
reason: It's definitely incorrect because he was having a great time before he fell out, and obviously you would not be having a great time after you suffered serious injuries from falling out of a roller coaster. It's difficult because the statement contains many similar words from the text, but placed in a different order to make a different meaning.