What happens if your heart moves out of place can you die?

Depends: If the reason your heart moved out of place is because you fell (or jumped) off the Brooklyn Bridge, there will be marked displacement and you will likely die. But if it's out of place because you're walking on your hands or on a roller coaster, the movement is slight, it will return to normal when you're done, and it's unlikely that you'll die (as a consequence of the movement).