I thought when a rogue blinded you, your screen turned black.
And also, my very first character was a human paladin back in early 2005. And I saw a warlock with his voidwalker and thought the voidwalker was a horde.
I had no idea how to chat in general chat when a UD rogue attacked us in redrigde. I chatted in /s, even while dead.
I had no idea how a priest buffed me with stamina when I couldn't buff him with demon armor.