It never does to leave a live Dragon out of the equation.

it was easier to believe in the Dragon and less easy to believe in Thorin in these wild parts

The dragon is withered, His bones are now crumbled; His armour is shivered, His splendour is humbled! Though sword shall be rusted, And throne and crown perish With strength that men trusted And wealth that they cherish, Here grass is still growing, And leaves are yet swinging, The white water flowing, And elves are yet singing Come! Tra-la-la-lally! Come back to the valley!

Speak politely to an enraged dragon.

No dragon can resist the fascination of riddling talk and of wasting time trying to understand it.

So comes snow after fire, and even dragons have their ending.