For some time I was stuck on a part of the Data Hive mission when playing ODST on Legendary - it was the icy corridor where there are around 5 or 6 Brutes (one of them was a Brute Chieftain with a detached plasma turret.) I kept on getting frustrated and quite pissed off as either I was making sloppy mistakes and/or I was getting killed by the Chieftain all the time. In the end I took a break from playing ODST for a while and on Saturday I thought to myself "Why not? I haven't played it for a month, so I CAN get past the bit I'm stuck on!"
Anyway the first attempt ended in failure as after killing the remaining Brutes, the Chieftain gunned me down. The second attempt was really epic - I killed three Brutes easily and when everything was quiet I made a run for it. A few seconds later I run into a Brute armed with a Brute Shot (he roared when he seen me), run past him and continued on my way (running while jumping) while avoiding his shots. I turned the corner just in time and luckily the wall corner saved me from his last shot as I was already low on health at the time. And all the while I asked myself "Where was the Chieftain exactly?"
In the end I went into Theatre mode and watched the replay. It turns out that somehow I slipped past the Chieftain without noticing him - he was miles away and when he realised his mistake (the other Brute's roar must have alerted him) and he started to run but then he stopped. What I didn't realise is that when I was running down the corridor the Brute with the Brute shot was actually chasing after me while firing his weapon at me and he stopped when I turned the corner. When I was playing it at the time I thought it was close, but I didn't realise how close it was when I watched the replay.
It was the best 6 minutes of my life XD And what made it special was the same day I managed to beat ODST Campaign on Legendary!
In 1997 when I got the full version of Grand Theft Auto, (bought an M-rated game from a store with cash when 9 years old) and started destroying stuff using weapon cheats, at some point in the game there was a glitch. There were so many burning cars littering the streets, that it was no longer possible for police or ambulances to get to where I was wreaking havoc. For some reason however, pedestrians and civilian cars would still spawn. So I could continue the mayhem without interruptions. It didn't even matter if I died. Cops would still not show up fater I woke up in the hospital.
I didn't understand game glitches or memory shortages yet, so I actually thought that I had blown up so many ambulances in front of the hospitals, that no new ambulances could drive out from the hospital, therefore no dead cops could be revived, therefore, no new cops could get after me.
I was playing Skyrim (for the record, I suck so much at Skyrim it's embarrassing) and halfway through the Bleak Falls Barrow Quest, one of the first missions in the game, I decided to change the viewpoint.
I was playing Bioshock not long ago, and was inside Sander Cohen's apartment (I had not killed him) I pissed him of, and he was going to "teach me how to dance" (He was going to kill me) Right before he opened the door, I had planted a mine by the door. He ran right into the mine. I found him with the upper body stuck in a corner, but he was alive, so the feets was moving.
I laughed so hard, 'couse he really was showing me how to dance!