Philip Nitschke, otherwise known as “Dr. Death,” became the first doctor to legally administer a deadly injection to one of his patients in 1996. Now, the euthanasia guru is designing a 3D-printable suicide machine called Sarco, which will allow people to die peacefully. The coffin can be printed with a 3D-printer and uses liquid nitrogen, which can be bought legally. After you have taken your seat inside the machine, nitrogen starts flowing. After a minute and a half you start to feel disoriented—a feeling comparable to that of having a few too many drinks—and a few minutes later you lose consciousness. In about five minutes, you're gone.