Did you know it is dangerous to roll your desk chair down one of the stairs?

I have to start by saying I am not certain why Middle Boy's desk chair was anywhere other than his room and definitely not sure why it was near the stairs.  That is simply a side note though.

Apparently he was near the stairs and was leaning down to fix an area rug when the chair went down the first stair and slammed into the wall at the landing.  At the same time he went tumbling down the stairs and hurt his nose and his wrist.   He can't really move a couple of his fingers and his hand is getting really pale so we are headed to the emergency room.

I am going to have to put signs in the house discussing the dangers of rolling chairs near stairs.