in the scene where the little cart with gun shoots up the place, Hendershock shoots the Bulldozer with a rocket launcher. later the woman picks the rocket launcher up without reloading it and gets shot then fires the rocket launcher, destroying the Miller Beer truck.
Here's the real kicker . . . the weapon they use is a LAW (Light Anti-tank Weapon), which is a single-shot "disposable" weapon. You fire it once, then ditch the tube because you CAN'T reload it (during Vietnam, the VC did figure a way to convert expended tubes into mortar launchers, but there's no way to reload another rocket into the tube). Yet in the movie, they fire the same tube at least 3 or 4 times.