In a historic moment at the World Indoor Championships in Birmingham, every athlete in a men's 400m heat has been disqualified.
Abdalelah Haroun, a Qatari who won bronze at last year's world championships, was first to leave after a false start.
However when officials looked back at the tape they realised that every remaining athlete in the field - Taplin along with Steven Gayle from Jamaica, Austris Karpinskis from Latvia and Alonzo Russell from the Bahamas - had committed a lane infringement by running out of their lane just before the end of the first lap.
Juan Miguel Echevarria became the youngest male field event victor when he took the long jump and Katarina Johnson-Thompson claimed her first global title in the pentathlon at the world indoor athletics championships on Friday.
The first two athletes in each heat were supposed to advance through to Friday evening's semi-finals, but confusion soon reigned about five minutes after the race when every athlete's result was wiped out.
The 19-year-old Echevarria leaped a personal-best 8.46 meters to upset world champion and Olympic silver medalist Luvo Manyonga.More news: NRA: Trump Doesn't Want Gun Control
All five runners, including the world's fastest man this year, was disqualified in a freakish race on the second day of competition on Saturday. Yorgelis Rodriguez of Cuba was third, 113 points behind Johnson-Thompson.
Apart from the 400m men's heats, the morning session also included 400m heats for women, 3000m heats for men, 60m heats for women and three heptathlon events for men and three pentathlon events for women. "I will have more chances".
The British athlete finished 33 points ahead of Ivona Dadic of Austria.
Grenada lodged a protest on Taplin's behalf but the appeal was rejected.
The final two events, the long jump and 800 meters, will be later Friday.