Sentence 1: Klaus went to the beach on vacation. 
 Sentence 3: He went to investigate 
 Sentence 4:  Suddenly, Klaus felt a sharp pain in his foot 
 Sentence 5:  He had stepped on a jellyfish 
 Option 1: He only wanted to sunbathe and avoided the water. 
 Option 2: As he was sunbathing, he noticed something in the water.