One of the goofs in this film: When Mike is outside the library, there are no columns outside, but when he enters, the shot from inside the library shows one.

• 电影中有一个这样的穿帮镜头：当迈克在图书馆外的时候，外面并没有圆柱。可当他走进图书馆，从里面望出去时，却有根柱子立在那里。