He's laying down because
he's freaked-out about the 300 foot drop on either side of him. From the
summit you can see all the way into the Salt Lake Valley (above left).
Year-round snowpack
The "Glacier" is a quick way down. Many hike Timp just for this unusual
thrill. Prepare to get bruised and bloody.
Remember Boxelder Peak?
Here it is again as seen from Timpanogos.