An update.
Just talked with Libby, she was on the bike in front of Greg when he went down. (So she didn't see exactly what happened)
Greg has a broken arm, a broken wrist on the other arm, 5 broken ribs and I'm not sure what this means but his C7 vertebrae is chipped.
But he's alive!
He is at (again I'm just passing along the info Libby gave me as she sat in Greg's room) JPS in Fort Worth.
1500 Main Street. The Pavilion building, Room 503.
Here's a link for more hospital info, http://www.jpshealthnet.org/About-JPS/JPS-Locations/Maps-and-Locations.aspx
Greg, you are in our prayers!
Chip