Though I claim to not understand emotionally induced vomiting, I can kind of see how you might get a little sick to your stomach when about to be blown away execution style and have your corpse dissolved by lime in a boarded up abandoned building in Baltimore. The first episode of the new season of The Wire presented me with throw up scene when that new tough girl character, Snoop, and her mentor/accomplice were about to shoot a random character covered in a shower curtain. I'll concede that under the circumstances that might be an appropriate bodily reaction.