Not really anger, but utter frustration to the point it gave me HIVES! No other experience so far in my 27 years of life has come even close to that amount of outrage. It was the Red Dragon boss in Demon Stone, a PS2 brawler hack'n'slash from the guys who made the Lord of the Rings hack'n'slash movie tie-in movie games. Your supposed to stun it with a spell, but unless you stood in a VERY precise spot, the spell would BOUNCE off him, hit your mage and eventually kill him. The whole last bit of the fight was arduous for after that you had to jump on the buggers head with the parties rogue, and that TOO was laced with horrible hit detection. It took me more time to beat that boss than any other besides Ruby Weapon from FF7, and I cheated for that one. 4 hours after working a 9 hour night shift at the docks and a case of short-lived hives. I enjoyed every other level of that game though.