In the scene where Professor Klump comes into Denise's classroom while class is in session, he is making his way through a bunch of students trying to get to a vacant seat. On stage, the shadow of Klump goes across the viewing screen as if he is walking through the projection of the overhead projector. The problem is, the overhead projector can be seen on stage with Denise, so how could Klump have walked through the image? See more...
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Nutty Professor II: The Klumps (2000) - 1 with picture
Screenshots of mistakes that have been online for less than a year are only visible to members, but the rest are available to everyone. Don't forget to check out the picture of the day, updated daily, and the top 30 screenshots too.
Continuity: In the scene where they are in the all you can eat restaurant, when PaPa Klump farts into the candle causing the curtain to catch fire, when they first show the curtain after the 2 men put out the fire, there is clearly a burn mark on the edge of the curtain. However, when they show the curtain again, there is no burn mark.