When Lee is getting worked on by the doctor his pant leg is cut off, but later as he climbs into the dump bucket he has a full length pant leg again.

When Ellie, corrie and Kevin are attempting to get a better look at the Showground, just before Ellie runs up to the fire truck, they all lean up against a blue Suzuki the number plate on said car is CR 22 xx it goes from clean to dirty in half a second.

When Ellie is attempting to get a better look at the Showground, she runs up to and grasps a Rural Fire Service tanker. The doors to the crew space are closed. In the next part, when she crawls underneath, the camera pans up and the doors are now open.

Numerous examples of flame-filled explosions that apparently send people flying along with various bits of the set; while nearby trees and bushes are unaffected.

Numerous examples of helicopters (which are very loud) not being heard until they're almost directly overhead. In reality these are audible from some distance.

When snakes are killed, they don't just go immediately limp. Their nervous systems continue to work for several minutes afterwards and they keep writhing unless their spines are almost totally destroyed.

Numerous examples of vehicles exploding when a bullet hits the fuel tank. Contrary to popular belief, liquid fuel is not explosive, it isn't even flammable. What explodes is vaporized fuel - and then, only if mixed with air in a precise ratio.

During the garbage truck chase, many lights can be seen on in the windows of numerous businesses lining the streets, as well as various illuminated signs in the background of several shots, despite the fact that the power is supposed to be out in town, and that most of the invasion took place during the day when no lights would be on.

The helicopter hovering above the home is a Robinson R44, being a small 4 seat, single piston engine helicopter. A military force would never use this type of helicopter for any purpose. The sound effects are that of a larger turbine engine helicopter (which helicopter is difficult to judge as the sound has been modified) and do not match the R44 piston engine.

The kids have been out of phone touch for several days, but nobody thinks to check their phones for messages and missed calls until they realise the landline is not working.

The country has been invaded and all the people rounded up, yet there's no sign of any looting anywhere. This would have to be a first in world history.

The invaders round up the entire population. No real-life invaders have ever done that: it would destroy the value of the invaded society and create immense problems feeding and guarding them. Even the Nazis did deportations by stages.