Sentence 1: Toni was getting some groceries. 
 Sentence 3: Another woman told Toni she was there first 
 Sentence 4:  Toni was very upset 
 Sentence 5:  She ended up throwing something at the woman 
 Option 1: When she was about to check out, she was stopped by a man. 
 Option 2: When she was about to check out, she was stopped.