Plot hole: This could be a "suspension of disbelief" issue, but at the climax of the movie when the murderer's accomplice gets shot, Jack has to grab the rope to save the dangling Dean. Objects (including people) fall at 32 feet/second, and speed up after that. That's roughly 10 yards/second, which is the speed of a world class sprinter. Jack was a speedy fellow to get to that rope, especially with street shoes, no starting blocks, and a slippery surface to boot (not to mention his age).
88 Minutes (2007)
1 plot hole
Directed by: Jon Avnet
Starring: Al Pacino, Leelee Sobieski, Alicia Witt, Amy Brenneman, Ben McKenzie
Continuity mistake: When Jack is talking on the phone to Forster live on TV, the clock behind Jack goes from 11:08, to 11:12 in the next shot of Jack, and back to 11:08 in the following shot of Jack.
Dr. Jack Gramm: Who sent you here?
Mike Stempt: What, you think I'm too dumb to figure it out myself?
Dr. Jack Gramm: Yes I do.