When I was playing (Unchained) Alistar, my whole lol screen turned black as soon as i died. When I respawned I could see the map again.
This happened over and over. (I think I died like 7 times in total, and all of those times the screen turned black)
I don't know if anyone else has experienced this with alistar, or any champ in general, or if it's just a glitch that happened one game.