Is this possible?!

[armystrong]

I was watching my two year old step daughter last week when she got hurt. I put her in a kitchen chair and set a bowl of Cheerios in front of her. She got mad because she didn't want Cheerios and went to push them away, but pushed on the table instead. She pushed herself back, tipping the chair and hit the back of her head when she landed. She lost one tooth on impact and two more at the dentist. He said it is impossible, but I watched it happen. Can anyone else PLEASE verify that this can happen?!