Imagine how bad it would have been if he'd done the same motion withOUT your hand there, right?
When Ds was 6 months old we went out to eat shortly before xmas. The restaurant was packed and BUSY. We generally simply held DS on our laps, but since he was 6 months old, we decided to try something new, and put him in the wooden highchair the restaurant provided. It said 6 months and over on it, we figured it was fine.
DS was having fun, but then I noticed that he seemed a little sleepy. I mentioned it to Robert, and said I'd take DS out of the highchair. Just then our food arrived, and I figured it was safer to leave DS in the chair rather than move him around while hot plates of spaghetti were being put down on the table.
Then I either forgot or I thought he'd woken up from the activity (I don't remember my reasoning or if there was reasoning) and I left him in the chair and I started eating. Out of the corner of my eye I saw him swaying, and before I could react, whammo went his face on the thick wooden table.
Everyone else at the table thought nothing of it, but I could tell that it was bad. I started struggling with the seatbelt in the highchair, and as I got it open, he started to scream.
We were pretty much as far from the restrooms as we could possibly be (just a few more tables for perfect a cater corner/diagonal line), and I had to carry him through all those tables...got some cold water on a wad of paper towels to put on his mouth as he cried and bled....
Turned out he had just knocked a (brand new!) lower tooth out. It was barely hanging on, then shortly after disappeared (only to reappear a month or so later on our carpet at home right between the wall and edge of carpet...must have stuck to someone's clothing and dropped there, and I only found it after DS pulled down some potpourri).
We rushed up to the children's hospital, where the triage nurse told us "there are sick people here, take him home...if he swallowed it it will pass or dissolve, don't worry about it", so we went home. The next day he was just about fine (except for sticking his tongue where the tooth had been). He nursed just fine, he didn't hurt. I of course cried bunches.
Later, we found out that either genetics (hubby's father's family has awful teeth that crumble!) or the impact on his face or just some random occurence caused two of his upper teeth (that weren't out yet) to come in yellow, turn brown, then start to crumble, so at 2 those were pulled.
And he's chipped one of his top middle teeth more than once...since we are extended nursers, I can tell you from first, um, "hand" experience that chipped teeth smooth out VERY quickly.
He'll be OK, the tooth will smooth out. If it starts changing, then he'll get to have a dentist appointment, and even if they want to pull it (that's out choice for babyteeth) it'll be fine. Find a great pediatric dentist (will let the calm parent back with him, will start assuming the best of DS's behavior and doesn't jump to extremes to make sure DS stays still (DS had a cavity filled with NO medicine, and just a tad of lidocaine for the two teeth that were pulled, for example), they communicate with you and don't judge you) and it will be OK.
The difference is -- he is no longer upset and I am still crying! I feel like a terrible mother. 
. Accidents happen, he'll be fine. Guess the parents' saying, "it hurt me more than you" is ture.
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I think most moms have been there! I know I have and I cried a lot more than he did! My DS's dentist says he does not usually worry to much about the baby teeth because it is pretty common for those to get broken/chipped, but he said that if something happens to one of their adult teeth, put it in milk and call him, because it might be able to be saved!
