Pulp FictionShawshank RedemptionApollo 13The FugitiveRockyDie HardProbably a bunch more. The Fugitive is one that has stopped me in my tracks for 2 hours more than any other movie.
Last of the MohicansSnatchThe Bourne films
Damn, forgot "Snatch"
Off the top of my head:JawsAlienAliensGoodfellasCasinoGodfather 1 and 2ScarfaceStar WarsPulp FictionPredatorThe Good, the Bad and the UglyUnforgivenDirty Harry movies (early ones are better)No Country for Old MenFull Metal Jacket (turn it off after Pyle shoots himself)Million Dollar Baby (turn it off after she breaks her neck)
Taxi DriverHeatDeliveranceEscape from New YorkGladiatorSling Blade
Plus, The Fifth Element, I love that dumb movie so much.