The Brownlee brothers have become a social media hit this week after older brother Alistair sacrificed his own chances of winning the ITU World Triathlon Final in Mexico to help younger brother Johnny, writes Chris Broadbent.
The Olympic triathlon champion's 26-year-old brother had led the race until the last 200m when fatigue took over. Instead of sprinting past his sibling and racing for victory with South African Henri Schoeman, Alistair instinctively grabbed his brother and helped him to the finish line.
It was a show of brotherly love and sportsmanship that captured the affections of the Twitterati. Here are some other great running-related moments that have twanged the heart strings...
Before he went on to win quadruple gold, Owen was on the verge of being eliminated from the long jump qualifying round after two no-jumps. However, the intervention of nearest rival Luz Long of Germany saved the day. He helped Owens change the marker for his run-up. Owens qualified and went on to win with the sporting German taking silver.
2016 Olympics - 5000m heats
With 2000m left in their 5000m heat, New Zealander Nikki Hamblin tripped and accidentally felled USA's Abbey D'Agostino. The American – who injured her foot in the fall – helped up her Kiwi rival before trying to continue. Running on a damaged ankle, D'Agostino later fell and this time Hamblin came to her aid. The two then ran the rest of the race together, abandoning all attempts to qualify.
Cross Country International
2012 Olympic marathon bronze medalist Abel Mutai had an international cross country race in Navarre, Spain in his back pocket as he strode to the finish line in December 2012. However, he had mistakenly thought the finish line was ten metres earlier than it was. Second placed Spaniard Ivan Fernandez Anaya had an opportunity to steal a rare victory over the Kenyan. Instead, he tapped his rival on the shoulder and guided him to the actual finish where he claimed his rightful victory.