Having to play Gauntlet on the N64. I swear, I was the only person I know who hated that game, and EVERYONE wanted to play it...
Actually, that Berserker level in Gears of War 1 with an AI team mate. The dumbass kept walking in front of the Berserker, so I tried my damnedest to keep the Berserker's attention while getting him to break through doors. The last time I played that game, the part that truly made me hate the game for all eternity, was when I finally managed to get the berserker to blow out the last door, I jumped out of the way when he charaged back inside and I sprinted outside and prepared the laser for him to charge me again. But that furking AI teammate... The teammate could get out of the door, he blocked the berserker. I was charging the laser so it would hit him as he charged me, but he hit the side of the door while the AI was coming out, walked up behind the AI, and my laser finally hit the ground. Just in time for the berserker to backhand my teammate into the laser. I just said "Fuck it" switched to Halo, and vented some frustration. If the AI hadn't been so god damn stupid I would have finished it in five minutes, but I quit after two hours because of that fucker.
So I guess escort missions are my immortal enemy, which is depressing with two really cool-looking action games coming out that are nothing but one giant escort mission... If my friend can't defend themselves, let the assholes die. I should not lose because of it!!