A Shock to the System

A Shock to the System 1990 is a U.S. dark comedy crime thriller film directed by Jan Egleson, starring Michael Caine, Swoosie Kurtz, Elizabeth McGovern, and Peter Riegert. It is based on the 1984 novel A Shock to the System by British author Simon Brett.

An unfortunate accident occurs in the subway, caused by Marshall, in which a panhandler is killed. It goes unnoticed, which gives him a whole new set of ideas as far as his future life is concerned.Deciding to take revenge on all the people who have caused him problems in his life, Marshall starts meticulously planning their violent deaths. This includes his wife, whom he eventually electrocutes, and his young rival at the office, Bob Benham. ........

Source: Wikipedia