Flatliners is a 1990 supernatural horror-thriller film directed by Joel Schumacher.
Plot[]
A medical student (Kiefer Sutherland) ponders what it's like when you die. In finding out the answers, he and several friends engage in an experiment in which they "flatline" for a brief period of time and then come back to report what they see. However, as time progresses, the experiment gets more and more dangerous.