I was building a rail road, in minecraft, on the xbox 360, in the over world, wearing all diamond armour at night. A spider attacked. I thought no big deal, hit it with my ax. Instead the screen got jumpy, and I died almost instantly. The message on the screen read "[player] Doomed to fail." when I respawned. Then I went back and all my stuff was gone. This is an unmoded version of the game, what happened?