Revealing mistake: When the cab skids off the road and down the hill you can see that it never actually hits the tree - it is yanked back with about a decimeter left to go before it would hit.
Look Who's Talking Now (1993)
1 revealing mistake - chronological order
Directed by: Tom Ropelewski
Starring: John Travolta, Kirstie Alley, David Gallagher, Tabitha Lupien
Other mistake: When James and Samantha are in the cabin, James asks for a phone. Samantha points him towards the kitchen and then unplugs the phone in the living room. He then says the phone is dead, but unplugging one phone wouldn't render all the other phones inoperable.
Daphne: What's your name?
Rocks: They call me No.
Daphne: Silly, that's not your name. That's what they say when you're bad. There must be something else, what're they always calling you?
Rocks: Well there is that rocks thing.
Daphne: Rocks, that's it.
Trivia: When Kirstie Alley is working as a mall elf, she says to a girl waiting in line "No, I'm a Vulcan." This is a reference to her memorable movie debut as Lt. Saavik in Star Trek II: The Wrath of Khan (1982).