Did they ever flub that one?!!

[Jack Corbett]

One of my absolute favourites:

ROBOCOP:
The "Rocket on a wire" mistake.

- When ED-209 fires the rocket at RoboCop, you can see quite plainly that it is moving along a wire. It moves downwads as the rocket goes forward. (The wire is also visible when the first rocket is fired, abeit not as clearly)