Lool, I dunno if thats where he pushed down onto it to get it out or is generally like that. Its a wisdom tooth and a fillin wasnt a good choice seeing as it was right at the back, round the back of the tooth. So couldnt brush properly.

 Got mine out a while ago too, they had to break it in half still my mouth though, not pleasant.

 my guess, death.

 I did smell it and it doesnt really smell of anything to be honest...

 I love smelling things!!