You were a scientist that tried finding the key to immortality. You got your test subjects from the black market as your 'subjects' were ACTUAL people. Yikes. You had tested on multiple test subjects but they had all failed or died in the starting process. You were testing your new subject when suddenly, your subject's eyes snap open and looks at where it was: A vat of acid with connecting wires and tubes filtrating out his body. He stares at you, unable to speak. You press a button, emptying the vat of acid, allowing him to speak.

"How do you feel, Test Subject #256?" You asked, your tone filled with awe. You finally did it. Immortality.