US track star cost half marathon national title, $20K prize after being mistakenly led off course
Although, to be honest, I was nowhere near the top, but at my first Republic Tiger Triathlon (RIP), when I transitioned from the bike to the run, somebody ran through the transition area and out. I followed him, but he was not a participant, and he ran the wrong way down the trail outside the exit. Loud spectators corrected me, but I got a few extra steps in in my quest to climb from the very lastest to the top 50% of finishers. Which might actually have been my best result ever anyway.


