By killing each other — medically — and staying dead for longer periods of time, trusting that their colleagues will be able to resuscitate them each time.
For those unfamiliar with the original 1990 thriller, Flatliners follows experimental medical school students who want to investigate the afterlife.
Only, the longer that these folks stay dead, the more trouble they start to create in the supernatural realm.
The idea behind Flatliners really can work in almost any decade, so I’m not vehemently opposed to Sony trying to bring it back for a new audience.