Swimming with Sharks

Swimming With Sharks also known as The Boss and Buddy Factor is a 1994 American comedydrama film written and directed by George Huang, and stars Kevin Spacey, Frank Whaley and Michelle Forbes.

Buddy turns out to be the boss from hell he treats Guy like a slave, subjects him to sadistic and public verbal abuse, and has him bending over backwards to do meaningless errands that go beyond just his work life. Guy is humiliated and forced to bear the brunt of his insults. Guys only solace is his girlfriend, Dawn, a producer at Buddys firm. When Buddy apparently fires Guy in a phone call, Guy snaps and kidnaps Buddy in order to exact revenge. He ties Buddy up and subjects him to severe beatings, torture and mind games. It is later revealed that due to a botched call waiting function on Buddys home phone, Guy hears Buddy and Dawn arranging a rendezvous at Buddys house.Once in Guys power, Buddy reveals for the first time a human, vulnerable side, telling a tragic story about his wifes death and revealing that he too was once a bullied assistant to powerful, tyrannical men and spent a decade putting up with such abuse to get to where he is today. He also reveals that abusing Guy was his way of teaching him that he has to earn his success. Dawn arrives at the scene to find Guy aiming a gun at Buddys face, and Buddy tells Guy that he has to pull the trigger in order to get ahead in the business. After a moments indecision, Guy fires the gun. ........

Source: Wikipedia