My WTF moment happened just this morning. I was playing Halo 2 and fired the SR at a Jackal with a shield. For some reason the bullet killed the Jackal, bounced of something, and killed the Jackal standing next to it
I have no idea how I did it. I was running down a slope in Sand Trap I think, and they guy came from around a corner, and bam, splatter. If I remember correctly, it was a bit laggy, so that might have had something to do with it.