The smoking tooth will not be found on Wikipedia. Even with it being one of the most important videos to watch, in regards to the health of mankind.
It shows scientific evidence for how easily mercury is released from mercury based dental fillings.
It doesn't talk about how bad mercury fillings are, in regards to how much material must be removed to even use a mercury filling. The dangers of mercury in your mouth is another thing you won't find on Wikipedia.
If you somehow dismissed the video (probably before it was even finished), be sure to watch the follow up video, before you make the mistake of claiming it isn't mercury vapor, or somehow the UV light caused it, or whatever people come up with to deny reality.