In this case it was the looking around and seeing if there were any witnesses of concern, for example, people who may jump in to help the victim, stop or identify the attacker, cops or security guards. I find it valuable to view these types of videos in the context of, "What can I learn from this," rather than, "He should have done X,Y,Z." Anybody can play computer-chair quarterback and call plays from a safe position (and in doing so, you don't learn anything), but what is more important is learning a small take-away from viewing attack videos. In this case, if someone looks around for witnesses, consider that it may be time to get moving, whether that's moving in to slam the guy or sprinting to safety.
Train smart & stay safe,
NOVA Self Defense