Revealing mistake: After Casi runs the guy through the chest with the samurai sword, one can see that the two ends of the prop are not aligned, appearing bent.
Revealing mistake: After the coach [Michael Jai White] told Billy that the group of people present all chipped in to pay his entry fee, there was loud cheering ("Yeah!) but it wasn't obvious from where the cheering was coming - except when there was a close-up of a particular person. Otherwise, the people in the crowd - especially those closest to him - did not appear to be cheering. The cheering, as well as the people in the background (green screen), must have been added. (00:04:08)
Revealing mistake: Lower-third shots of the aquarium in the background at the Delaware Raceway's sports lounge were often blurred and did not look like they matched full views of the aquarium. (00:36:05 - 00:36:34)
Revealing mistake: When Alana is walking toward the students, the hedges are mostly dark green, sheared level across the top, and reach to her elbows. Later (after Gary tells Alana he will take a mirror), the hedges turn mostly yellow and flower-like across the top, are quite uneven, and are as high as her shoulders in spots. (Use of a green screen is apparent). (00:00:40 - 00:01:26)
Suggested correction: One look at the scene make it apparent this entry is totally incorrect. The bushes look natural. The yellowness is just colour grading. There is no sign of green screen usage whatsoever. It would make no sense for this film, especially if you realise that director PT Anderson is known to be very much against the use of any sort of VFX or green screening.
Revealing mistake: The blue framed window the girls walk in front of after exiting the VW bus parked along the curb is presented as part of an extension of the house, but not when there's a front view of the entire house. The windows are actually aligned with the front door. (00:11:44 - 00:15:00)
Revealing mistake: There's no doubt that Joey and his mother were not real kangaroos, but there wasn't even an attempt to make them look at least semi-real with animatronics or better CGI. The kangaroos' appearances were more along the line of what would be expected in a cartoon or all-animated movie. (00:01:00)
Revealing mistake: Each time Julia lifted the roof window on the camper, it was flush with the roof (like a sun or moon roof). However, two individual shots of that area showed a raised section about a foot high with two windows on one side - totally different from the flat roof window. An aerial view of the roof did not indicate that these were in different areas of the roof. (00:52:20 - 00:55:03)
Revealing mistake: When Rachel sees the burning car, the blatant CGI flames are moving in slo-mo.
Revealing mistake: The rear of the steer's carcass was on fire and smoldering, but wasn't seconds later in the aerial view. Also in the aerial view, the position of the steer relative to Alexander was different. (00:06:00)
Revealing mistake: When Paul and his father Leto are walking through the field between storage bins/sheds, the sheds are largely situated perpendicular to their path. After they stop walking, the angle of the shed behind them shifts to being roughly horizontal to their path. A front shot of Paul still shows a shed on the opposite side as being perpendicular. The background also changes to blurred, still images of dried grass (with no light breeze). (00:14:09 - 00:14:43)
Revealing mistake: In a sudden downpour, "rain" falls vertically, across a single line. (00:18:28 - 00:19:44)
Revealing mistake: The man sitting at a sidewalk table perhaps 4' behind Henry was suddenly very close in back of him. (Use of a green screen). (01:17:24)
Revealing mistake: The blemish/mole that was on the right side of Ghost's nose showed up on her left side (and she was not looking into a mirror). (00:57:40)
Revealing mistake: The door to Sharyn's room enabled her to look down the long hallway, but after she saw the man with the bloody face near her door, there was a hallway to her left instead of in front of her. (00:08:55)
Revealing mistake: The front bumper on Malik's Jeep was already wrecked/partially hanging before it hit the ground. (00:40:45)
Revealing mistake: The white ball on the back of Ken's Santa Claus hat reaches to about the bottom of the white band, but occasionally is lower and sometimes even touches his shoulder. The slight variation in the amount of his forehead that extends below the hat does not appear to be able to account for the ball's reach relative to Ken's neck/shoulder. Also, the location of the seam on the left side of the white band moves higher or lower. Ken is never seen adjusting his hat. (00:16:17 - 00:16:39)
Revealing mistake: Scottie (with Jamie) drove away in a blue four-wheeler that had a cab area (front windshield, roof, and four support bars or frame). At times, the four-wheeler did not appear to have a roof, the windshield was not visible, and the frame was gone - indicating they were not in an actual four-wheeler during these filming times. (01:13:58 - 01:16:00)
Revealing mistake: At Wendy's 50th birthday party, the helium balloons did not move, even when her daughter Liz walked next to some of them while carrying a birthday cake with lit candles. (00:01:44)