The next time I go mining alone, I'm going to randomly stop and say things in local chat to troll any invisible mods watching. If they are watching, it'll be really funny. And if they aren't watching, nobody will know...
I was so hoping you would get your evidence, and then either punch him into the lava or punch a block out so the lava flows to him. It had me on the edge of my chair!
Next time I go mining imma say "imma go mining bringing back tons of diamonds" then I'm going to dig a random hole as if I had cheats but really I do not. xD
I remembered this gif and felt it was relevant. Sometimes when I'm mining I find random dark tunnels that I know are x-rayers tunnels, but I still look through them to see if there's anything there.