We called 911 and the EMT folks came and checked him out.
I looked for him over the next few weeks and didn't see him. Feared the worst. But Josh had told me where he went to school, so I called the registrar and she sent him a message. He's OK.
He started this blog to post photos of the installation. Josh Farr and Mikhaela Stinson's The Palace.: http://thepalaceburlington.blogspot.com/
Here are the "After" photos, taken in mid-October, 2009.