Finishing an Olympic 4x400 relay on A BROKEN-FRICKIN' LEG. Manteo Mitchell heard it pop with half a lap to go (200m) but still finished well enough to give the USA a tie in the heat. He clearly was in shock as he said, "I figured it's what almost any person would've done in that situation." I hate to sound lame, but not me. I would've opted for the rolling-around-in-pain-on-the-track option.
I think after this show of toughness, the IOC should let him dope all he wants til the next Olympics.