Corrected entry: When Ferris is about to jump in the pool to save Cameron there is a cookie floating in the water. As he jumps in it disappears.
Corrected entry: The whole day's time sequence is terribly out of whack. For instance, when Rooney is wiping his face off after being spat on by the "Karate Champ" girl in the pizza joint, Ferris catches a fly ball. Harry Caray's play-by-play call can be heard in the background. He's calls the name "Lee Smith," indicating Lee Smith was on the mound for the Cubs. Lee Smith was a closer and likely would not be in the game until the 9th inning. Most day games at Wrigley start at 1:20 and last at least 2 hours. Therefore, the time would be about 3:30 PM when Ferris caught the fly ball. After that, he had time to make it back down to the Loop for a parade (presumably by elevated train), pick up the car, get back up to the North Shore (probably a decent 30 minute ride) take a dip in the pool, save Cameron's life, and race home to be in bed by the time his parent arrived home (6:00 sharp if you'll recall the father's lines at the beginning.) That's bad continuity. Aside from that, prior to the game, they dined at Chez Quis and went to the Museum (South Loop area).
Correction: While the ballgame used in the film was real, it wasn't meant to represent a real game, it's still a fictional ballgame that was being played for the first time. So Smith could have been in early. Pointing this out as a mistake would be like pointing out that Abe Froman never had reservations at Chez Quis that day.
Correction: Actually, the game was intended to be the June 5, 1985 game between Chicago and Atlanta, which started at 1:25pm, ran 3 hours and 9 minutes and ended at 4:34pm in a 4-2, 11-inning loss by the Cubs. Smith closed the game. All of which makes the timeline even more crazy - between 4:35 and 5:55 (just under 90 minutes) they caught a Red Line train downtown (the ride alone would have eaten up 20 minutes, minimum), then walked to the AI at Michigan Avenue, walked around, then picked up the car and started heading north (again, a 30 minute drive from downtown, more in rush hour, and they would have been driving in rush hour), stopping for at least one detour along the way.
Correction: After watching the scene twice, and even pausing it, there is no cookie floating in the pool to begin with, or even anything resembling a cookie, at any time.
Bishop73