So, I'm mining alone, with my trusty alumite hammer (Thanks, Tinker's) doing my standard tunnel pattern. I had some strangely shaped dirt and gravel patches, which I cleared with the excavator, and went to pound out a single piece of cobblestone. This piece of cobblestone turned green, started spewing green tiles - which damaged me - and then I blew up - according to the chat log. After I had died, everything was lava around me. What happened? Aside from me dying I have no idea what occured.