* Go to IMDB.com and look up 10 of your favorite movies.
* Post three official IMDB "Plot Keywords" for these 10 picks.
* Have your friends guess the movie titles.
These are pretty much all well-known movies; I tried to pick the more obscure (but still accurate) keywords.
EDIT: Nobody has even attempted a guess at #4, so let me offer my favorite quote as a hint:
"What the fuck are you doing, robbing your own house?"