So, um... This is the latest thing that has come out of watching Lost with my roommate. I think it came about at some point earlier when she said that Jack should be a witch doctor. And then, during "The Other 48 Days" when the
dramatic tribal drum music was playing during the montage of the later days, she was like "WHAT IS THIS MUSIC, IS THIS WITCH DOCTOR JACK ON HIS BONGOS?" And from there, the "Tribal Jack" characterization was born, following in the footsteps of Sex Addict Auron and Porn Star Gippal.
The bit about the jar of hearts... I don't even know. I think it came from comparing him to the
Shaman Heartless which led to us imagining him ripping hearts out of people and offering them as sacrifice to Kingdom Hearts. THIS IS WHY WE SHOULD NOT BE ALLOWED TO WATCH THINGS.