Sentence 1: John was very focused on the grill. 
 Sentence 3: But just a few minutes before they were done, a pretty girl walked by 
 Sentence 4:  John walked over to talk to her 
 Sentence 5:  Five minutes later he returned to a grill full of burned burgers 
 Option 1: He was very hungry and wanted to eat as soon as his mother was done cooking them. 
 Option 2: He had been entrusted to make sure the burgers were perfect.