Corrected entry: In the scene when Billy is having dinner with his father and his co-workers, when Billy is eating his soup, the soup never enters his mouth. The actor who plays Billy (Adam Sandler) tilts the spoon and the soup goes directly into the bowl again, but when he goes to talk to Carl he wipes his face to make it look like he has eaten his soup when really he hasn't.
Corrected entry: When Billy is calling Danny McGrath closer towards the end of the movie, you can hear the ringer ringing before he is done dialing.
Corrected entry: In the scene where Billy is talking to the O'Doyle mother, she claims that the father is in jail and won't be out for a very long time, yet a few weeks later, the father is seen driving the car with all the O'Doyle kids.
Corrected entry: In the scene where Billy is drunk, and he goes to Veronica's house, when she closes the door, you can clearly see that she has a wedding ring on her left ring finger. Earlier, when Billy and his friend call her to ask if she has a boyfriend, she says no.
Corrected entry: Before the last competition commences and everybody is sitting in the big hall, Miss Vaughn is sitting with the 3rd grader, Eric, on her right hand side. After Billy has delivered his speech, Miss Lippy is now sitting next to Miss Vaughn, and Eric is no longer in sight.
Corrected entry: During third grade graduation party, Miss Von tells Billy how proud of him she is for standing up for another school mate "yesterday" on the field trip. The field trip was one week prior, because Miss Von said on the day of the field trip "you will graduate next week."
Corrected entry: In the beginning of the movie Billy says he'll go to school for 2 weeks per school-year which gives him 24 weeks to go all the way to graduation. His dad says if he finishes by June 15th he wins. Billy was just in the pool no more than a day ago and it was obviously pretty warm outside, how is this possible if it's 24 weeks from June 15th? That would make it December the previous year.
Corrected entry: During the music sequence, Billy is still wet. Somehow Veronica is dry, and changed, and the whole 3rd grade class joins in the sequence but Veronica came alone.
Corrected entry: In the end, when Billy is graduating, his academic robes are actually that of a Doctorate. You can see that his sleeves have stripes on them. Only doctoral robes have those stripes.
Corrected entry: When Ms. Vaughn is at a graduation party with Billy in the yard, Billy tells her that he moved out into a tent behind the house. But throughout the movie it shows Billy waking up in the mansion, even though there was a bed in the tent.
Corrected entry: At the beginning when Billy's in the pool, he has sunscreen in one hand, and a beer in the other. Then when he swims to his friend, they are gone.
Corrected entry: The Elementary school Janitor is spying for the evil guy that wishes to overtake the company, and goes to the Madison office block - why does his take his mop with him? It's extremely unlikely that he would take his own mop to school, and thus carry it around with him.
Corrected entry: When it shows all the desks of each grade that Billy has to complete, Erik (the guy who wants the company) puts two holes into Billy's head and then later on when he progresses to higher grades the eyes have magically repaired themselves.
Corrected entry: Billy Gets a Valentine from the headteacher. It is a card which we see him open to read what's inside, but when they show up the writing in the inside it is clearly a single piece of paper without a front.
Corrected entry: When Billy is in the first grade, he is making a snowman. All the other students are making perfect looking snowmen with cotton balls, but Billy's is nothing but a huge mess of cotton balls, construction paper, and paste. It looks nothing like a snowman. However, when Billy is outside of school and is putting the moves on one of his classmate's moms, his teacher, Miss Lippy, brings out all his stuff from class that day, including his snowman, which now looks absolutely perfect.
Corrected entry: In the part where he is putting water on his pants because its cool, the water pours out. But the kid before him had to keep pumping to get water out.
Corrected entry: When Billy drives to his first day of high school you hear him turning off the engine of the car. If you look at the hood scoop, it is still shaking because the car is still running.