Chris Leben's coach Burton Richardson speaks with BJPenn.com:

The truth is that Chris was sick. He had a fever and chills when he stepped into the cage. He was vomiting in the lockeroom before the fight, and after a hard warm up he didn't have a drop of sweat. Big heart to fight like that, but he was moving slow motion.

Sick, not sick, excuse, or no excuse, I've got tons of respect for fighters who go in and lay it on the line even when they're not at 100%.  The pressure to perform is great inside the UFC, and Leben has a reputation for going out and throwing down no matter what, he went for it even though he wasn't totally healthy.  It doesn't erase the loss though, hopefully Leben can come back and score yet another breathtaking victory for his friends, family, and fans.

Photo via Sherdog.com