Plot hole: When Vic steals the food from the group in the desert, we see he's been standing about 100 yards from them, all the while they've been digging. This is filmed on the Bonneville Salt Flats, with completely flat ground for miles around. Did the group just not notice a guy (and a dog) standing that close to them? Did they not think of protecting their site with a guard (there are 2 kids and a cripple there, but even they don't notice Vic until he's just ten yards away, running towards them)? As well, the crime 'boss' character allows Vic to get away and does not chase him - he even laughs that someone has the guts to try it. Food is very precious in this world, and nobody would likely allow this theft, much less a criminal boss.
Factual error: In the fight immediately after Vic meets Quilla June, someone approaches Vic's nest from the right and fires just past his head. Vic turns and returns fire. The raider, who was moving forward, flies back from the impact and dies. Of course, bullets don't spread out their impact energy enough to knock someone back, no matter the caliber.