Continuity mistake: When MAC is blown by the helicopter, he lands on a man's windshield, and the man has to start dodging traffic. Between shots the traffic he is dodging changes. (00:10:45)
Visible crew/equipment: When the MAC's emerge from the NASA craft in the lab, there a shot through the lab glass of the father MAC, with the reflection of a cameraman holding a camera in the glass. (00:08:55)
Continuity mistake: When Mac's on the windshield and the car starts to dodge cars, one shot from inside the car shows the alien has disappeared.
Continuity mistake: When Eric following the wet footprints outside, to the edge of the lawn, the footprints change in appearance drastically, between shots. (00:23:15)
Revealing mistake: A wire can briefly be seen on MAC, as he does the flips in the air, in McDonalds, in the teddy suit. (01:02:55)
Continuity mistake: When Debbie's mum stops the car, as MAC speeds past them on a remote control car, she parks on the right side of the road. In the next shot her car is on the left, then back on the right. (00:51:00)
Continuity mistake: When Eric wheels himself outside in his wheelchair, to follow the footprints, as he exits the double doors, he goes down a ramp. Later, when his brother walks through the doors, the ramp has vanished. (00:23:10 - 00:24:10)
Revealing mistake: When the man's car swerves out of control after MAC lands on his windshield, a pile-up occurs. In this scene, it can be seen that the drivers are either absent, or dummies. (00:11:00)
Continuity mistake: When Debbie is putting Mac, who is hidden in a teddy suit, into the back of her mum's car, as her and Eric leave to go to Brittany's birthday party, the car window changes from halfway rolled up, to fully rolled up between shots. (00:57:55)
Revealing mistake: When Eric is riding through the hills and fields away from the cops, with MAC in his lap, ramps can be seen to help him with maneuvering his wheelchair easily. (01:04:15)
Audio problem: In McDonalds, when the cops come in after MAC, Mike is getting pushed by them, as they try to pass, and he shouts "What's he done wrong." yet his mouth clearly says otherwise. (01:04:00)
Visible crew/equipment: In the desert, after MAC communicates, he stands and points, and then Eric, Debbie and the others drive him away. However, in the shot where he stands and points, the outline of the puppeteers hand through the red shirt is very visible. It is also visible at other points as well. (01:13:15)
Continuity mistake: When we see the two holes drilled through the wall, by MAC, there is nothing above the holes being made, yet in all the following shots a large painting is above the holes. (00:29:10)
Continuity mistake: When Eric and the others find the MACs' in the old mine, they give them drinks. The MAC by Eric then begins to stand up. Between shots a long strip of black bin liner appears over his legs. (01:18:50)
Revealing mistake: MAC is grabbing the electric fence, being blown backward by the helicopter. When he releases his grip, wires can be seen attached to his hands. (00:10:35)
Continuity mistake: 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. (00:47:35)
Continuity mistake: In the van chase scene, Mike is hanging out of the window trying to pick up Eric in his wheelchair, as they flee from the running cops. As Mike tries to pick up Eric, his sunglasses keep disappearing and reappearing. (01:07:15)
Continuity mistake: After offering MAC the drinks of water, Eric pulls the drink away from him twice. (01:08:05)
Continuity mistake: 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. (00:20:30)
Revealing mistake: In the pile up scene, due to MAC covering up a man's windshield, a huge truck swerves and flies over a car, only the big black ramp used for the stunt is rather visible. (00:11:00)
