A few seconds later I realized I had walked into a door.
Nicole (the receptionist) asked "are you alright?"
I said "No, I don't think so" and collapsed in a chair.
My knee was very sore and I had a bump on my forehead that will be a bruise tomorrow. I asked for ice and lay in the dentist's chair with a baggy of ice on it throughout the exam.
Everyone in the dentist's office knew I was the one who walked into the door.
Josh was the most comforting. He told me that he has also walked into a glass door - on the way to his first Kung-fu class. Immediately, I felt affirmed as one of the herd of people who walk into doors but are not idiots, or are, but are social about it.