Sentence 1: Two friends were talking to each other on the phone. 
 Sentence 3: The other friend interrupted him and made fun of his mistake 
 Sentence 4:  The first friend became embarrassed and said he had to go 
 Sentence 5:  He hung up the phone and pouted 
 Option 1: One friend fumbled a word as he tried to pronounce it. 
 Option 2: After a great conversation they hung up.