Continuity: When Eric first talks to Debbie, as she stands on the balcony, the position of the bracelets on Debbie's right wrist keeps changing.

Continuity: After the delivery guy puts Eric's TV down, it changes position in the following shot, and so do the cables on top of it.

Continuity: When Eric and Mike find the newspaper clippings and papers left on the table by MAC, to try and tell them about where he came from, the papers' positions change between shots

Continuity: When Mike is getting ready to pick up Eric and haul him into the van as they flee from the cops, in exterior shots Debbie is leaning out of the window, but in interior shots of the van, she is sitting inside, and the van window is closed as well.

Continuity: When Eric and Debbie are looking out the window at the cops, Eric is lightly pushing down on the blinds. He is pushing the blinds down in the center of the window. In the next shot he is pushing the blinds down much harder at the bottom of the window.

Continuity: When Eric and Debbie are looking out the window at the cops, Eric is lightly pushing down on the blinds. He is pushing the blinds down in the center of the window. In the next shot he is pushing the blinds down much harder at the bottom of the window.

Continuity: At the beginning, when the NASA spacecraft lands on the MAC planet, there are three silver antenne around the side of the craft which are absent in some shots.

Visible crew/equipment: After Debbie and Eric have captured MAC in the vacuum, it goes out of control, causing Debbie to get flung around the room. The track that goes up the wall, across the ceiling, down the other wall and across the floor is visible for this stunt.

Continuity: When Eric is playing with his remote control car, he stops and takes the battery out. In the next shot, when MAC touches the car, the car is now in a different position.

Continuity: After the father MAC smashes the panel of glass at the science lab, there is more glass missing in the second shot, although no further breakage is heard nor seen.

Audio problem: When Eric's wheelchair goes out of control, and he starts to roll down the hill, Debbie cries out "Eric" but her mouth doesn't move.

Continuity: When the MACs' are sucked into the NASA spacecraft, an explosion occurs, causing a grey cylinder capsule to fly off. In the next shot the capsule is attached to the craft again.

Continuity: When Eric and Debbie are at McDonalds, they give Brittany two presents, putting them on the corner of the table. However when MAC extends his arm to get the drink, the presents are no longer there. They then keep appearing and disappearing.