Long story short, I am mining a huge area, and was just putting all of my items in a chest. I turned around and saw this.
There are eight total creepers in the photo. (One is really hard to spot. See if you can spot them all!) Two total blocks were unlit, however the other one is not near where the creepers were. I have read about pack spawning, but could two packs spawn in the exact same block within seconds? What exactly happened here? (Note: I have not gone cave lighting)