There is nothing to be gained by all these or all them do things in unison. Most of these crimes are situational. Know your environment before getting into an event which may be over your head. Furthermore, things happen fast, you may be measuring your action while a group acting on impulse is not going to weigh consequences. Lastly, be extremely on alert when confronting more than one person. Most all these attacks are one verses two or more advaceries.
I recall one incident in Newark years ago wherein four blacks followed a Cuban guy into his walk up with the intent to rob. They had guns. In the end, he stabbed to death three of them and chased the fourth down the street at full gallop! They did not know he had worked the sugar cane fields his whole life and could accurately swing a blade. Guy should have been given a medal!!
Your only hope in those cases is to have one or more either screaming on the ground, unconscious or dead, immediately.
Didn't she say she had grown up in the area?