Factual error: The helicopter shown in the film (N801JB) was manufactured in 1979, 8-9 years after the film was set.
Factual error: When Angus and Mr. Hunham go to the liquor store, the sign on the door shows that they are open on Sundays. In 1970, Massachusetts still had blue laws in effect, and a liquor store would not have been open on a Sunday.
Factual error: In a shot where Mr. Hunham's car is driving towards the camera past a brown building, there are a few modern 2000s cars parked in the open that are very easily noticeable since the shot zooms in on the car as it passes by them. (01:23:58)
Factual error: During the Christmas party, "Silent Night" by The Temptations' Silent Night is playing. That version of the song, with Glenn Leonard singing lead, wasn't released until 1980.
Factual error: The basketball court in the gym has a 3-point arc. High school didn't adopt the three-pointer until 1987-88. (01:00:00)
Factual error: When driving on the roads on the way to Boston, Mr. Hunham's car passes by a red house where you can see what is a parked 2000's car, though obscured only slightly by some branches from a bush or tree. (01:23:30)
Answer: The best information I read was from an online "People" magazine article. Actor Paul Giamatti says he is sworn to secrecy on how the lazy eye effect was achieved, other than to say it was "movie magic." I hope someone finds additional information and shares it here, as I'd like to know more.
raywest ★
According to a YouTube video from WhatCulture that I watched today, Giamatti recently revealed on the Howard Stern Show that he wore a big soft contact lens, which practically blinded him in that eye.
Phaneron ★