5. Independence Day: Using an old space ship as cover for two humans to infiltrate the alien mother ship and upload a virus to destroy it.
4. Hackers: Dumpster diving in the target company's trash in order to obtain financial data from printouts.
3. War Games: Password cracking the military computer system by studying its creator.
2. Ferris Bueller's Day Off: Faking a grandmother's death to get Ferris's girlfriend excused from school through multiple phone calls and answering machine recordings.
1. Star Wars: R2-D2 gaining access to the death star main computer and shutting down the garbage dispensers (remember the com link!).

I thought they were too funny not to post here..

That aside, the list is part of a better article called Social engineering reloaded, which is a worthwhile read.

Cheers,

-jk