Sentence 1: Ken went to his friend's house for dinner. 
 Sentence 3: Ken had broken his friend's wooden chair 
 Sentence 4:  Right after the snap Ken fell to the floor 
 Sentence 5:  Everyone laughed at Ken and his misery 
 Option 1: As he sat down at the table he heard a snap. 
 Option 2: As he sat down on the sofa he heard a snap.