Audio problem: When Doc and Marty return to the year 1955, you hear the squealing sound of tyres braking heavily, but the DeLorean is flying. (01:02:25)
Audio problem: When James is rushing Mollie to the hospital, the camera is down the road from the taxi. James is saying something like, "You should do Lamaze breathing. It helped my sister," yet his mouth is not moving.
Audio problem: When the three die-hard Indian's fans are arguing over the ball that gets hit out of the park (a guy is saying "It's too high"), one of the guys says "Who gives a s***, it's gone". If you look closely at his lips, he is saying something entirely different. (00:38:00)
Audio problem: When Gwen is getting hit on by the drunk guy who says "nice outfit", the lines for both drunks have been poorly dubbed over and don't match their mouths.
Audio problem: In one scene Miss Daisy is listening to the radio, but the HiFi sound isn't exactly what a small radio in the early 50's was able to deliver. (00:33:40)
Audio problem: When Turner is playing with Hooch in his living room, Hooch is chasing Turner and barking at him. However, the audio of the barking is way out of sync with any movements of Hooch's mouth.
Audio problem: When Harry and Nikki are driving in the vintage speedster with no brakes, Nikki is heard saying "same old family crap", but her lips mouth "same old family shit".
Audio problem: When Tango and Cash first meet the Assistant Warden, somebody dubs over his voice and the words don't match his movement - and it is very obvious that it is not his voice. (00:45:00)
Audio problem: When Russ jumps from out behind the bush and says, "I say that ant is ours", his mouth doesn't move.
Audio problem: When Dooley is in the car on stakeout, he is playing on a Nintendo Game & Watch. They were only capable of bleeps and buzzing noises, yet this one has a sampled laugh, which was never possible on these handheld games. (00:02:20 - 00:10:55)
Audio problem: At the Video Armageddon shortly after the event host first realises Jimmy isn't there, the female voice counting down the time proclaims "...the Video Armageddon will commence in T-Minus two minutes and counting". However, the digital timer on the stage is at precisely 01:00, not 02:00. (01:21:15)
Audio problem: During dinner on Christmas Eve there is a shot of the cat chewing on Christmas lights. The sound of the cat chewing is a fraction of a second off.
Audio problem: When the guy goes to draw his gun on "Indy" George in the beginning, there is the sound of it coming out of a hardened holster, but the guy didn't have a holster on. The gun was in his belt.
Audio problem: When Bill, Ted and the other historical figures are getting Sigmund Freud into the phone booth, in a shot shown from outside the window looking into the booth, Freud says "What are you doing", but his mouth isn't shown moving along with the line. (00:47:13)
Audio problem: The auctioneer says the object that Oliver is bidding on is Japanese, but the insert angle of the brochure said it was Chinese. It could be a character mistake, but that wouldn't move the plot anywhere and, besides, this is a movie, so the one who designed the brochure most probably didn't know what the script said.
Audio problem: During the fight with the Scoleri Brothers, Egon warns doctor Stantz about the sudden apparition of the ghost coming through the wall. He yells "Behind you, Raaay!", but in the close-up Harold Ramis' mouth is not uttering "Behind you." (00:35:50)