It failed the Smaug test.
Because he pulled out the tray before it was cool
Poop in the specimen cup.
Because they can't reach the high notes. Bonus: how does dwarves communicate? Smalltalk.
Because they were Miners... XD
Because he has to cosign
A dental rental.
Dragon drop
The Defenestration of Smaug.
You'd probably have more fun.