lol these new raids are the most faceroll crap ive ever seen in game, roughly the difficulty of the lk heroics after everyone out geared them by 2 tiers, and you're complaining about drops, hehe, funny.
Your world first clear of heroic is so awesome that none of us can even see it.
Anyway, ontopic: Never seen anything like this before, but I couldn't help but laugh a little when I saw the pic. Going be doing LFR DW tonight/tomorrow, hopefully I won't be as unlucky.
I heared there were 9 items on his loot table so the chance for this to happen (1/9)^4. The chance is small but it exists so there's a chance it will happen.