You were an experiment, and, the doctor talked about how you were his most successful experiment, and, his favorite.

you were sitting in his office as usual as the doctor left to get some supplies, Leaving the door wide open... You saw an opportunity and ran out the door into snowy forest beyond the lab.

You had made it outside and ran into the snowy forest when you heard the doctors voice right behind you.

"Run for your life and I'll tear out your heart, it'll always be mine."