Side note, you couldent rip someones heart out through the chest, there is a bone that sits more or less over the heart, the sternum, and its quite thick.
Youd be hardpressed to get through it with a knife, much less your hand.
When they do surgery they need rib spreaders.
To rip someone's heart out you would need to go up through to stomach area.
Anywho, just an interesting note.