He saw the moonwell there. Moonwell = Night Elves. Night Elves gave him the metaphorical finger oh so long ago. So he pisses in the moonwell and it explodes, like some Goblin 'Guaranteed-Safe!!!' Shaving Foam.
I've seen things you newbies wouldn't believe. Advert-spammers aflame off the shoulder of
rec.arts.sf.written. I watched Cancel Posts glitter in the ether near the waikato.ac.nz gateway.
Now all those moments will be lost in time - like beer in the rain. Time to unsubscribe.
Its all part of his plan to make the new Worgen-tree in Darnassus the new Goldshire on RP-Servers.
Deathwing actually own that place, but housing bubble made nobody buying that place (that's why nobody's going over there).
Then He heard Varian just moved money from action house to SW bank for bail out.
Therefore Deathwing destroyed his own property for insurance claim.
Nope just like Azshara if its not being used either blow it up or stick a goblin cartel in it , oh wait same thing :P.