Remember - enjoy every minute of the race (to the extent that's possible). Then when you get back to work on Monday and people say "how was the race?" you can honestly reply "I had a good time!" - even if you finished last! It's what I always focus on (6 IM finishes, none faster than 14 hours) so you just tell people that. They sort of say "oh... " and scratch their heads. You don't have to specify whether "good" means "enjoyable" or "fast" - let them figure it out for themselves.
Have a good time!
Jay
