During the triathlon, Canada's Simon Whitfield crashed on his bike and accidentally took out Leonardo Corrales of Costa Rica in the process. Check out this awesome letter he sent to Whitfield following the race.
Paralympic runner slash first-time-Olympian Oscar Pistorius failed to place in the 400 meter semifinals, but immediately after the race finished, first-place runner Kirani James of Grenada walked back to shake his hand and offer to swap racing bibs.
An example of true sportsmanship between two spectacular athletes. Also true examples of spectacular future Ebay memorabilia.