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Failure To Launch (2006) - 2 major mistakes
starring Kathy Bates, Matthew McConaughey, Sarah Jessica Parker (add more)
Deliberate "mistake": At one point they use a Red Ryder BB gun (Yes, just like in A Christmas Story) and the guy says "You pumped it more than twice, didn't you" to his female counterpart when they shoot the bird. Red Ryder BB guns cannot be cocked/pumped more than once, due to the simple nature of the toy gun that it is.
Continuity: When Tripp has gotten ready for the day he comes down to the kitchen. We find his mother writing Tortilla Chips on the dry erase board. When Tripp finishes off the OJ in the kitchen he tosses it into the trash can opened by his mother. We see the dry erase board in a couple of different shots and the way it is written changes from shot to shot.






