Mission Impossible - Time Travel?
I haven't seen the film in a while, so bear with me.
When the guy in the control room has a 'toilet problem' and goes in and out various times there is a clock on the wall.
Each time we see the clock the time jumps backwards and forwards by a few minutes.
I remember hiring out the video so I could rewind & fastforward to check I hadn't seen things.
Minor, but amusing.