Midnight happens more than once in a monster movie. To kill a vampire, you must set out 5 minutes before sunset. Nobody ever realizes until the end of a monster movie, that everyone that went into the dark cellar never came out. The group always splits up to look for the alien. Movies based on true stories are always made up.
Computers never crash.
Computers know everything. You must type frantically to keep a 3-D image moving on the screen. Everybody can type very fast. In the end, all resource limitations are overruled.