A real class act.

That's because Russia's Aleksei Nemov, the 2000 high bar champion and 12-time Olympic medalist, had the crowd at Olympic Indoor Hall buzzing with approval during his entertaining, acrobatic routine -- and then belting out boos of disapproval for the judges after a 9.725 came up, the lowest score to that point of the competition.

The booing and whistles grew louder while the judges reviewed Nemov's routine and eventually revised his score to 9.762, still not high enough for a medal. More boos ensued.

Nemov had to go back out on the floor and, after blowing the crowd a kiss, gesture for quiet.

"I want to say thank you to all the people," Nemov said after the event. "It was unbelievable. I think after this competition I might continue in China [for the 2008 Olympics]."

--NBCOlympics