Be it singleplayer or multiplayer.
Mine was in Halo 3 back in the day. It was a match of big team slayer on Sandtrap. I planted a land mine in the gorge between the two buildings at the start of the match, it somehow managed to remain there until the very last moments of the match. At which point two enemy warthogs with 3 players each drove past it at the exact same time netting me six kills at once. I had no fucking clue as to how I just got a six kill medal out of nowhere (was just cruising around on a chopper at the time) until I watched the replay and saw the epicness of what I had done.
Mine was in Halo 3 back in the day. It was a match of big team slayer on Sandtrap. I planted a land mine in the gorge between the two buildings at the start of the match, it somehow managed to remain there until the very last moments of the match. At which point two enemy warthogs with 3 players each drove past it at the exact same time netting me six kills at once. I had no fucking clue as to how I just got a six kill medal out of nowhere (was just cruising around on a chopper at the time) until I watched the replay and saw the epicness of what I had done.