Revealing mistake: When Frank is hanging off the roof, there is a pipe from which he tries to cling to. The first time we see it there is a white line where it will break. The next time we see it (just before it breaks) the line has been coloured in.
Revealing mistake: When Booth shoots the second hunter, you can see he that aims the gun at the mans stomach but the exit wound appears to be on the left side of his back, further up from where he aimed. (01:10:50)
Chosen answer: LA is short for Los Angeles, which refers to the city Leary attempts to assassinate the president in.
Jason Riley