So there I was, jollycocking about the rooftops stabbing guards (as I am oft to do), when something remarkable happened: one of them came back, with a vengeance. You see, as soon as the guard dropped like a sack of potatoes after murdering him quite brutally, he appears again behind me. "Must be a spawn point glitch," I thought to myself.

I soon realized how right I was. At that moment, another spawned from the same location. Then another, and another. Soon the entire roof was covered with rapidly-replicating rooftop rivals. Wide-eyed and dumbfounded, I grabbed my camera, as this seemed like a "screenshot or it never happened" moment.

The framerate went down to about 2fps and I was worried the game was going to crash, so I bolted as fast as I could (not very fast). I looked back once, and there were still guards falling off. After making a bit more progress during my escape, the game returned to normal.