Their leader, Shaun, displayed the core characteristics of a zombie-attack survivor: planning, watchfulness, and aggression. Alone among his companions, Shaun realized the gravity of the situation and responded with a thoughtful plan to lead them to safety. He was (partially) successful in large part due to his ferocious swinging of a cricket bat at the heads of approaching undead. He demonstrates a remarkable ability to improvise in challenging and changing combat situations.
Shaun's thoughtfulness is contrasted with other people caught on camera refusing to take the threat seriously, and consequently failing to survive.
People preparing for a zombie attack would be well-advised to watch this film to examine what works and what doesn't in an undead crisis.