As you are walking down Memorial
Drive, you see a man and a woman in front of you engrossed in conversation.
Looking at each other, they do not see another man coming towards
them. When he is a short distance away, he runs towards them, grabs
the woman’s arm, and yells, “Leave my girlfriend alone!” The
woman screams, and the man she was with balls his right hand into
a fist. At that moment you catch up to them.