These are hilarious:
http://tvtropes.org/pmwiki/pmwiki.ph...FiSillyScience
A few examples:
Super-intelligent computers blow up when the hero confuses them.
Super-intelligent computers get confused when the hero says to them "everything I say is a lie" or some other paradoxical statement.
Space vessels lack fuses, circuit breakers, and surge suppressors, so that the control panels explode when some distant portion of the ship is damaged.
Computers get reprogrammed by someone who has no knowledge of the computer's operating system.
Computer terminals display the current operation (e.g., "UPLOADING VIRUS") in huge, flashing letters.
The patently obvious design flaws in a vehicle or weapon system go uncorrected during the entire life cycle of the system in question.
A vehicles and/or weapons system is deployed in an entirely impractical environment.
Spacecraft features have been pointlessly carried over from water-borne designs.
An untested medical treatment is used. It's 100% effective and has no side effects.
Someone acquires a medical condition that will be fatal in an amount of time expressed to the tenth significant digit; the cure is found and applied in the nick of time, enabling a 100% recovery.
A robot is shot and bleeds oil.
