All the best to Dan Rose in Florida's Iron Horse 100 tomorrow. I know he's not running (well, not the entire distance anyway) as he's recovering from a shin injury.
I know he'll be sensible and only run a short distance before stopping to avoid making things worse. He then plans to help as a marshal/feed station assistant which is very good of him. In many ways helping at an ultra is harder then running.
Hope you're back running for the Mohican Trail, Dan.