My unluckiest: I went mining, got a lot of diamond and gold and other stuff, then I went to the nether with my stuff (totally proud of how clever I am going mining then going to the nether directly) and simply I was getting some flowstone on a big tower of dirt, then I fell. I spawned back in my bed, went back to the nether in hope that I find my stuff, I didn't. I srsly cried that day.