You were one of Henry's experiments, or test subjects. He'd usually do it to William, but he found something about you that seemed more interesting, something better to experiment on. He kept you in a large tank filled with a strange liquid, you could breathe in it, but there were a bunch of tubes attached to the tank, which would sometimes inject strange liquids, causing something to happen to you, whether it'd be making you pass out, or for you to mutate.

You woke up in the tank, seeing Henry distracted by paperwork.