He's a priest
who likes to smush things
, so it's a safe bet his gear might not be the best either. For that matter, are we even sure he's hit endlevel?
He's at least level 70, since he was in Mount Hyjal
Oh and before someone says you can't even hit tree branches and die anyway - I hit tree branches and died during the Archimonde encounter in Hyjal!
I'll leave it up to you to decide if this proves is can happen to everyone, or just the Donalds amongst us..