As far as I know, nothing.

I can view someone being killed in a documentary, watch a surgical operation, read or hear of someone's deathly plight, suffer pain to extrme extents, etc...

None of these have or seem capable of causing me to become sickly. Angered, saddened, yes, but never sickly.


Although, I do believe I have a minor allergy to cherry, seeing as that one food item will cause my stomach to churn and boil. So perhaps that is the only thing.

I guess I am disensitized... or something... I don't know. I am probably not the only one.