Last lap..

Found him.

The guy in the orange jumpsuit was hanging out at that corner with the megaphone making lots of noise.  It was deafening when EVERYONE came through.  Even the last guy.

It was really really amazing
http://youtu.be/ljTlCPfzj-4?t=3m21s

cued up there at the spot where i'm in the video.  Check out the whole lap.  The camera angles made some of the most difficult features look easy.