Once in a while, you come across someone who you decided to mess with and who you absolutely should not have messed with. Notable entries to this list who come to mind would be John Wick (seriously, leave the guy's dog alone), Master Chief (Grunts don't call him “The Demon” for nothing), Clint Eastwood in Gran Torino (who inspired the intro quote), and Granny (park in her space at your own peril). These individuals all have the common trait of displaying a laid-back outward demeanor that doesn'…