This is precisely why "situation awareness" is so important! Even if the guy had a gun, he would have been helpless. The camera showed the two attackers sitting in a car... he should have seen them as well.
This is a terrible event that "could" have been avoided.
Maybe situational awareness would have kept him from being surprised, when I go to the city (which is vary rarely) I know when someone is around me. I'm always aware of my surroundings anyways but it is heightened when I go there. I guess you could say I look around a lot a scan everywhere.
Century Arms AR-15A2, 5.56
1946 Mosin-Nagant M44, 7.62x54R
1978 YUGO SKS, 7.62x39
NEF Protector Pump, 12 gauge
Savage Model 64, .22LR
NEF Pardner Tracker II, 12 gauge
Rock Island Armory 1911A1, .45 ACP
Remington 870 'Express Magnum' 12 gauge
Bersa Thunder .380